note: mil-std-413 has been redesignated as a test method
TRANSCRIPT
NOTE: MIL-STD-413 has been redesignated as a Test Method Standard. The coverpage has been changed for Administrative reasons. There are no other changesto this Document.
MIL-STD-413C 8 DECEMBER 1980
SUPERSEDING MIL-STD-413B
28 FEBRUARY 1969
AMSC N/A FSC 5330
DISTRIBUTION STATEMENT A. Approved for public release; distribution isunlimited.
DEPARTMENT OF DEFENSETEST METHOD
VISUAL INSPECTION GUIDEFOR
RUBBER ELASTROMERIC O-RINGS
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
DEPARTMENT OF DEFENSE
WASHINGTON, DC 20360
Visual Inspection Guide forRubber O-Rings
MIL-STD-413C
1. This Military Standard is mandatory for use by all Departmentsand Agencies of the Department of Defense.
2. Beneficial comments (recommendations, additions, deletions) andany pertinent data which may be of use in improving this document shouldbe addressed to: Commander, Naval Sea Systems Command, SEA 3112,Department of the Navy, Washington, DC 20362 by using the self-addressedStandardization Document Improvement proposal (DD Form 1426) appearingat the end of this document or by letter.
ii
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
FOREWORD
Government material acquisition specifications have been primarilyconcerned with detailing composition, construction, and necessary physicalrequirements. However , little attention has been paid to defining thelimits of acceptable quality regarding manufacturing imperfections otherthan such generalizations as "the workmanship shall be first class." Insuch a diverse industry as that of rubber manufacturing, individual plantsvary considerably in their production and quality control techniques.Imperfections are likely to occur from many causes, such as variation inthe quality of the basic materials and variations in manufacturingprocesses and finishing operations. Therefore, the quality generalizationsused in this standard must, of necessity, cover a considerable range whichrepresents the best available judgement. This standard is issued as apractical yardstick which quality assurance personnel will use to appraisethe acceptability of O-rings concerning visible imperfections.
iii
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
CONTENTS
Paragraph 1.1.11.2
2.2.1
3.
4.4.14.24.3
5.5.15.25.3
Figure 1.2.3.4.5.6.7.8.9.
10.11.
12.
13.
14.
15.
16.
17.
18.
19.
SCOPE . . . . . . . . . . . . . . . . . . . . . 1Purpose . . . . . . . . . . . . . . . . . . . . 1Scope . . . . . . . . . . . . . . . . . . . . . 1
REFERENCED DOCUMENTS . . . . . . . . . . . . . . 1Issues of documents . . . . . . . . . . . . . . 1
DEFINITIONS . . . . . . . . . . . . . . . . . . 1
GENERAL REQUIREMENTS . . . . . . . . . . . . . . 3Examination conditions . . . . . . . . . . . . . 3Identification of imperfections . . . . . . . . 3Evaluation of imperfections . . . . . . . . . . 3
DETAILED REQUIREMENTS . . . . . . . . . . . . . 4Nondestructive tests . . . . . . . . . . . . . . 4Rejection of individual O-rings . . . . . . . . 4Sampling . . . . . . . . . . . . . . . . . . . . 4 & 5
FIGURES
Backrind, unacceptable, W = 0.070" (1.78 mm) . . 9Backrind, unacceptable, W = 0.103" (2.62 mm) . . 10Backrind, unacceptable, W = 0.103" (2.62 mm) . . 11Backrind, unacceptable, W = 0.103" (2.62 mm) . . 12Backrind, acceptable, W = 0.103" (2.62 mm) . . . 13Backrind, acceptable, W = 0.103" (2.62 mm) . . . 14Backrind, unacceptable, W = 0.139" (3.53 mm) . . 15Backrind, acceptable, W = 0.139" (3.53 mm) . . . 16Backrind, acceptable, W = 0.210" (5.33 mm) . . . 17Backrind, unacceptable, W = 0.210" (5.33 mm) . . 18Parting line indentation, acceptable, W = 0.070"(1.78 mm) . . . . . . . . . . . . . . . . . . . 19
Parting line indentation, acceptable, W = 0.070"(1.78 mm) . . . . . . . . . . . . . . . . . . . 20
Parting line indentation, acceptable, W = 0.070"(1.78 mm) . . . . . . . . . . . . . . . . . . . 21
Parting line indentation, unacceptable,w = 0.070" (1.78 mm) . . . . . . . . . . . . . 22Parting line indentation, acceptable, W = 0.103"(2.62 mm) . . . . . . . . . . . . . . . . . . . 23
Parting line indentation, acceptable, W = 0.103"(2.62 mm) . . . . . . . . . . . . . . . . . . l 24
Parting line indentation, acceptable, W = 0.103"(2.62 mm) . . . . . . . . . . . . . . . . . . . 25
Parting line indentation, unacceptable,W = 0.103" (2.62 mm) . . . . . . . . . . . . . 26Parting line indentation, unacceptable,w = 0.139" (3.53 mm) . . . . . . . . . . . . . 27
iv
Page
Downloaded from http://www.everyspec.com
MIL -STD-413C8 December 1980
CONTENTS (Continued)
Page
Figure 20.
21.
22.
23.
24.
25.
26.
27.
28.
29.
30.
31.
32.
33.
34.
35.
36.
37.
38.
39.
40.
41.
42.
43.
Parting line indentation, unacceptable,w = 0.139" (3.531 mm) . . . . . . . . . . . . . 28Parting line indentation, acceptable, W = 0.139"(3.53 mm) . . . . . . . . . . . . . . . . . . . 29
Parting line indentation, unacceptable,w = 0.139" (3.53 mm) . . . . . . . . . . . . . 30Parting line indentation, acceptable, W = 0.210"(5.33 mm) . . . . . . . . . . . . . . . . . . . 31
Parting line indentation, unacceptable,w = 0.210" (5.33 mm) . . . . . . . . . . . . . 32Foreign material, acceptable, W . 0.103"(2.62 mm) . . . . . . . . . . . . . . . . . . . 33
Foreign material, unacceptable, W = 0. 103"(2.62 mm) . . . . . . . . . . . . . . . . . . . 34
Foreign material, acceptable, W . 0. 103"(2.62 mm) . . . . . . . . . . . . . . . . . . . 35
Foreign material, unacceptable, W = 0.103"(2.62 mm) . . . . . . . . . . . . . . . . . . . 36
Foreign material, acceptable, W = 0.139"(3.53 mm) . . . . . . . . . . . . . . . . . . . 37
Foreign material, unacceptable, W = 0. 139"(3.53 mm) . . . . . . . . . . . . . . . . . . . 38
Foreign material, acceptable, W = 0.139"(3.53 mm) . . . . . . . . . . . . . . . . . . . 39
Foreign material, unacceptable, W = 0.210"(5.33 mm) . . . . . . . . . . . . . . . . . . . 40
Foreign material, unacceptable, W = 0.275"(6.98 mm) . . . . . . . . . . . 41
Excessive trimming, acceptable, W = 0.103" (2.62 mm) . . . . . . . . . . . . . . . . . . . 42
Excessive trimming, unacceptable, W = 0.103" (2.62 mm) . . . . . . . . . . . . . . . . . . . 43
Excessive trimming, acceptable, W = 0.103"(2.62 mm) . . . . . . . . . . . . . . . . . . . 44
Excessive trimming, unacceptable, W = 0.103"(2.62 mm) . . . . . . . . . . . . . . . . . . . 45
Excessive trimming, acceptable, W = 0.139"(3.53 mm) . . . . . . . . . . . . . . . . . . . 46
Excessive trimming, unacceptable, W = 0.139"(3.53 mm) . . . . . . . . . . . . . . . . . . . 47
Excessive trimming, acceptable, W = 0.210"(5.33 mm) . . . . . . . . . . . . . . . . . . . 48
Excessive trimming, unacceptable, W = 0.275"(6.98 mm) . . . . . . . . . . . . . . . . . . . 49
Excessive flash, unacceptable, W = 0.l03"(2.62 mm) . . . . . . . . . . . . . . . . . .
Excessive flash, unacceptable, W = 0.l03" (2.62 mm) . . . . . . . . . . . . . . . . . . . 51
v
50
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
CONTENTS (Continued)
Figure 44.
45.
46.
47.
48.
49.
500
51.
52.53.54.55.56.
58.59.60.61.
62.
63.
64.
65.
66.
67.
68.
69.
70.71.72.73.74.75.76.
Excessive flash, unacceptable, W = 0.103"(2.62 mm) . . . . . . . . . . . . . . . . . .
Excessive flash, acceptable, W = 0.103"(2.62 mm) . . . . . . . . . . . . . . . . . .
Excessive flash, acceptable, W = 0.139"(3.53 mm) . . . . . . . . . . . . . . . . . .
Excessive flash, unacceptable, W = 0.139"(3.53 mm) . . . . . . . . . . . . . . . . . .Excessive flash, acceptable, W = 0.139"(3.53 mm) . . . . . . . . . . . . . . . . . .
Excessive flash, unacceptable, W = 0.139"(3.53 mm) . . . . . . . . . . . . . . . . . .
Excessive flash, acceptable, W = 0.210"(5.33 mm) . . . . . . . . . . . . . . . . . .
Excessive flash, unacceptable, W = 0.275"(6.98 mm) . . . . . . . . . . . . . . . . . .
Non-fill, unacceptable, W = 0.070" (1.78 mm) .Non-fill, unacceptable, W = 0.103" (2.62 mm) .Non-fill, acceptable, W = 0.139" (3.53 mm) . .Non-fill, unacceptable, W = 0.139" (3.53 mm) .Non-fill, unacceptable, W = 0.139" (3.53 mm) .Non-fill, unacceptable, W = 0.210" (5.33 mm) .Non-fill, unacceptable, W = 0.210" (5.33 mm) .Non-fill, acceptable, W = 0.275" (6.98 mm) . .Non-fill, unacceptable, W = 0.275" (6.98 mm) .Mold deposit indentations, unacceptable,W = 0.070" (l.78 mm) . . . . . . . . . . . .Mold deposit indentations, acceptable,W = 0.l03" (2.62 mm) . . . . . . . . . . . .
Mold deposit indentations, acceptable,W = 0.139" (3.53 mm) . . . . . . . . . . . .Mold deposit indentations, unacceptable,W = 0.139" (3.53 mm) . . . . . . . . . . . .
Mold deposit indentations, unacceptable,W = 0.139" (3.53 mm) . . . . . . . . . . . .Mold deposit indentations, unacceptable,W = 0.139" (3.53 mm) . . . . . . . . . . . .Mold deposit indentations, acceptable,W = 0.139" (3.53 mm) . . . . . . . . . . . .Mold deposit indentations, acceptable,W = 0.210" (5.33 mm) . . . . . . . . . . . .Mold deposit indentations, unacceptable,W = 0.275" (6.98 mm) . . . . . . . . . . . .Flow marks, unacceptable, W = 0.070" (1.78 mm)Flow marks, unacceptable, W = 0.139" (3.53 mm)Flow marks, acceptable, W = 0.139" (3.53 mm) .Flow marks, unacceptable, W = 0.139" (3.53 mm)Flow marks, acceptable, W = 0.139" (3.53 mm) .Flow marks, unacceptable, W = 0.139" (3.53 mm)Flow marks, unacceptable, W = 0.139" (3.53 mm)
. 52
. 53
. 54
. 55
. 56
. 57
. 58
59. 60. 61. 62. 63. 64
65. 66
67. 68
. 69
. 70
. 71
. 72
. 73
. 74
. 75
. 76
. 7778
. 79
. 80
. 81
. 8283
. 84
vi
Page
57.
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
CONTENTS (Continued)
Page
Figure 77.78.79.
80.
81.
82.
83.
84.
85.
86.
87.
Table I.
II.
III.
Flow marks, acceptable, W = 0.139" (3.53 mm) . . 85Flow marks, acceptable, W = 0.210" (5.33 mm) . . 86Off-register and/or mismatch, unacceptable,w = 0.070" (1.78 mm) . . . . . . . . . . . . . 87Off-register and/or mismatch, unacceptable,w = 0.103" (2.62 mm) . . . . . . . . . . . . . 88
Off-register and/or mismatch, unacceptable,w = 0.139" (3.53 mm) . . . . . . . . . . . . . 89Off-register and/or mismatch, acceptable,w = 0.139" (3.53 mm) . . . . . . . . . . . . . 90Off-register and/or mismatch, acceptable,w = 0.139" (3.53 mm) . . . . . . . . . . . . . 91
Off-register and/or mismatch, acceptable,w = 0.139" (3.53 mm) . . . . . . . . . . . . . 92Off-register and/or mismatch, acceptable,w = 0.210" (5.33 mm) . . . . . . . . . . . . . 93Off-register and/or mismatch, unacceptable,w = 0.210" (5.33 mm) . . . . . . . . . . . . . 94Supplementary illustrations of surfaceimperfections . . . . . . . . . . . . . . . . . 95
TABLES
Index to photographs of representative accept-able and unacceptable surface imperfections . . 6
Quantitative classification of imperfections,maximum acceptable dimensions in inches . . . . 7Quantitative classification of imperfections,maximum acceptable dimensions in millimeters . 8
vii/viii
Downloaded from http://www.everyspec.com
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
1. SCOPE
1.1 Purpose. The objective of this standard is to assureacquisition of elastomeric O-rings with a surface quality level adequatefor their intended use. To achieve this objective, this standard:
(a) Includes illustrations and supplementary definitions anddimensions to identify O-ring surface imperfections for“the purpose of inspection, and
(b) Establishes quantitative levels of acceptance for O-ringsrelative to surface imperfections, type, size and quantity.
1.1.1 In general, this standard is intended to supplement theinspection procedure of a particular specification for O-rings. Whereno such procedure is provided, this standard becomes the primary guide.In the event of conflict between this standard and the inspection procedureof an end item specification or a specification for O-rings, the basicspecification shall govern.
1.2 Scope. This document covers only visible imperfections ofO-rings.
2. REFERENCED DOCUMENTS
2.1 Issues of documents. The following documents, of the issuein effect on date of invitation for bids or request for proposal, forma Part of this standard to the extent specified herein.
STANDARDS
MILITARYMIL-STD-105 - Sampling Procedures and Tables for Inspection
by Attributes.MIL-STD-109 - Quality Assurance Terms and Definitions.
(Copies of specifications, standards, drawings, and publicationsrequired by contractors in connection with specific acquisition functionsshould be obtained from the contracting activity or as directed by thecontracting officer.)
3. DEFINITIONS
3.1 MIL-STD-105 and MIL-STD-109 define critical, major and minordefects. The classification of an O-ring defect as "critical" requiresknowledge of the end use; therefore, critical defects are not includedin this standard but must be, considered in the basic specification(s).O-rings inspected for surface imperfections in accordance with thisstandard are determined to be either acceptable or unacceptable. Theconcept of minor defects is not applicable.
1
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
3.2 Theimperfections
(a)
(b)
(c)
(d)
(e)
(f)
(g)
(h)
(i)
(j)
(k)
(1)
following word descriptions apply to the visiblecovered in this standard:
Backrind. A longitudinal recess of wide angle U-like orW-like cross-sections, oriented circumferentially andlocated at parting lines, caused by thermal expansion oversharp mold edge or by premature cure.
Blister. A void or a hole in the body of the O-ring, whichmay or may not cause protrusion on the surface and maybe covered or open, caused by air being trapped duringcure.
Bloom. Material which has migrated from the body of theO-ring to the O-ring surface.
Excessive trimming. Flat spots or nicks, producing out-of-tolerance cross-section, caused by excessive buffing ortrimming of flash. An O-ring is considered ‘excessivelytrimmed” only if a flat area results to the extent thatan out-of-tolerance condition exists. Even when an O-ringhas not been "excessively trimmed", it could have animperfect trim or buff condition. "lImperfect trim or buff"is a condition, wherein abrasion, scuffing or tearing,generated when removing flash or parting line projection,result in a substantially coarser texture. ProtrudingO-ring material or a heavily abraded surface are theindicators of "imperfect trim" and are not acceptable onany size O-ring.
Flash. Very thin gage, sometimes film-like, material whichextends from parting line projection, resulting from moldseparation or inadequate trim.
Flow mark. A thread-like recess, usually curved, of veryslight depth in the unflexed state, with normal surfacetexture and radiused edge. It is caused by incompleteflow and knit of the material.
Foreign material. Any extraneous, embedded matter (suchas contamination, dirt, or undispersed pigment) ordepression, formed by its removal.
Mismatch. The cross-sectional radius in one ring halfis unequal to that of the other half. It is caused bythe dimensional difference in mold halves.Mold deposit indentations. Surface indentations, irregularin shape, with rough surface texture, caused by a build-upof hardened deposits, adhering to the mold cavity.
Non-fill. A randomly spaced, irregularly shaped, surfaceindentation, having a coarser texture, than the normalO-ring surface.
Off-register. Misaligned O-ring halves, caused by thelateral shift of one mold cavity plate, relative to theother.
Parting line indentation. A shallow, saucer-like recess,located on the parting line, caused by a deformity in moldedge.
2
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
(m) Parting line projection. A continuous ridge of material,situated on the parting line, caused by worn or otherwiseexcessively rounded mold edges.
(n) Porosity. Presence of numerous minute voids or sponginess,showing up usually in a cross-section cut.
4. GENERAL REQUIREMENTS
4.1 Examination conditions. The illumination during examinationshall be 400-foot candles, minimum. Bloom or surface dust, if presenton the O-ring, shall be removed before inspection.
4.2 Identification of imperfections.
4.2.1 Enlarged photographs of representative, acceptable andunacceptable imperfections are included to aid inspection (see figures1 through 86). The grid sizes are 0.1, 0.2, 0.3, 0.5 and 1.0 inch forlx, 2x, 3x, 5x, and 10X magnification, respectively.
4.2.2 Arrows have been added to selected 10X magnificationphotographs for aid in identifying the imperfection shown. 3X powermagnification , however, shall be used to aid in the detection ofimperfections, unless otherwise specified by the contract.
4.2.3 All photographs are indexed in table I, according to figurenumber, O-ring size (W), type of imperfection and classification ofimperfection (acceptable and unacceptable) . For some types of imper-fections, exaggerated line drawings are included to supplement the photo-graphs and to illustrate the nature of the imperfections more vividly (seefigure 87).
4.2.4 It should be borne in mind that this standard has includedphotographs of only the most common imperfections that occur during thefabrication of elastomeric O-rings. It is not feasible to obtain photo-graphs to show clearly all possible imperfections in all sizes. Further ,the definitions of imperfections in this standard do not abrogaterequirements of a particular specification , contract or order. Where othertypes of imperfections such as cracks or ruptures are found , the generalworkmanship criteria of 5.1 shall govern.
4.3 Evaluation of imperfections.
4.3.1 For the purpose of visual examination, it is recommended thatinspectors use , for reference and comparison, wire gauges or other typedevices in diameters of 0.002; 0.005; 0.010: 0.015; and 0.020 inch (or0.05; 0.13; 0.25; 0.38; and 0.51 millimeters (mm)). Such gauges shallbe positioned adjacent to imperfections for their size determination.
4.3.2 Quantitative classification of acceptable and unacceptableimperfections is shown in table II (showing dimensions in inches) and intable III (showing dimensions in mm). When any dimension of an imper-fection exceeds the value specified in tables II or III, as applicable,this constitutes an unacceptable imperfection for any O-ring having a cross-sectional width, "W", within the range shown. Otherwise , the imperfection
3
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1900
is classified as acceptable. In general, the dimensional limits of imper-fections are related to the O-ring cross-sectional width. For O-ring sizesappreciably larger than 0.275 inch (6.98 mm) cross-sectional width, qualityasurance personnel should refer to the particular specification involvedfor quantitative dimensional limits of imperfections.
5. DETAILED REQUIREMENTS
5.1 Nondestructive tests. In all cases, including where a conflictexists with this standard , the requirements of the applicable specificationshall govern. Workmanship and finish shall be in acordance with thehighest grade practice in manufacturing this kind of product. Manufac-turing practices shall be such that the physical properties of the finishedproduct shall be uniform in quality and condition, clean, smooth and freefrom cracks, ruptures, porosity, blisters, foreign materials or otherimperfections detrimental to the performance of the parts, as furtherdefined herein.
5.1.1 Each O-ring sampled shall be carefully examined for visiblesurface imperfection s (see section 4, and tables I, II, and III).Unacceptable imperfections (those which exceed the dimensional limits intables II and 111, as applicable, or those described in 5.2), shall because for rejection of O-rings.
5.2 Rejection of individual O-rings. Rejection of individualO-rings shall be based on the following:
(a) Each O-ring found to have out-of-tolerance dimensions shallbe rejected.
(b) Visual surface imperfections shall be cause for rejection,as follows:
Any O-ring with one or more unacceptable surfaceimperfection.
Any O-ring with radially oriented flow mark, regardlessof length.Any O-ring exhibiting poor general appearance, as definedin 5.1.
Such rejection applies equally to surface imperfections found on O-ringsinspected for any requirement under the applicable specification. Also,any O-ring which was part of a sample shall be rejected if it containsone or more unacceptable imperfections , regardless of whether its lot orbatch as a whole is accepted or rejected.
5.3 Sampling. All O-rings shall be subjected to one or moreMIL-STD-105 sampling procedures, as specified by the contracting activity,except where the material specification includes a sampling plan. Unlessspecified otherwise in the material specification, purchase order or
4
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
contract, an Acceptable Quality Level (AQL) of 1.5 percent defective shallused . Acceptance or rejection of the lot, sub–lot or batch shall be onthis basis, except where already rejected in 5.1. In the application ofMIL-STD-105 to this standard, the following shall be noted:
(a) Inasmuch as inspection to this standard is to determinewhether O-rings are either acceptable or unacceptable andin view of 3.1, minor and critical defects do not apply.
(b) Any sampled O-ring which is rejectable, as indicated in5.2, shall be considered defective for the determinationof the acceptance or rejection of the lot it represents.
Custodians : Preparing activity:Army - M I Navy - SHNavy - SH (Project 5330-0532)Air Force - 99
Review activities:Navy - OS, ASAir Force - 11
User activities:Army - ATNavy - MC
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
6
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
7
Downloaded from http://www.everyspec.com
8
O-r
ing
cro
ss-s
ect
ion
al
wid
th
‘W’
Less
tha
n 2.
542.
54
to
3.42
3.43
to
5.
205.
21
to
6.83
6.84
and
ove
r
TA
BLE
III.
Qu
an
tita
tive
cl
ass
ifica
tion
o
f im
pe
rfe
ctio
ns.
m
axi
mu
m
acc
ep
tab
le
dim
en
sio
ns
in
mill
ime
ters
.
Bac
krin
d
Dep
th
Wid
th
I0
00.
080.
130.
100.
150.
100.
150.
130.
251
Pa
rtin
g
line
ind
en
tatio
ns
Dep
th
Wid
th
0.08
0.25
0.08
0.38
0.10
0.51
0.13
0.63
0.15
0.76
For
eign
ma
teri
al
Dep
th
Wid
th
Io
00.
080.
130.
100.
180.
130.
250.
150.
38I
Pa
rtin
g
line
pro
ject
ion
and
exce
ssiv
efl
ash
Max
. ht
.
0.08
0.08
0.10
0.13
0.15
No
n-f
ill
Dep
th
Wid
thI
o0
0.05
0.25
0.08
0.38
0.08
0.63
0.08
1.02
Mol
d de
posi
tin
de
nta
tion
s
Dep
th
Wid
th1 I
0.08
0.25
0.08
0.38
0.10
0.51
0.10
0.63
0.13
0.76
Flo
w m
arks
0.05
1.52
0.05
1.52
0.05
4.57
0.05
4.57
0.05
4.57
Off
-re
gis
ter
and/
orm
ism
atch
Max
.
0.08
0.10
0.13
0.15
0.15
O-r
ing
cro
ss-s
ect
ion
al
wid
th "
W"
Less
tha
n 2.
542.
54
to
3.42
3.43
to
5.
205.
21
to
6.83
6.84
and
ove
r
Dim
ensi
ons
of
impe
rfec
tions
ar
e ac
cept
able
un
less
th
ey
exce
ed
the
valu
es
spec
ified
in
th
e ta
ble.
NOTE
:Le
ngth
an
d w
idth
of
an
im
perf
ectio
n ar
e sy
nony
mou
s ex
cept
fo
r ba
ckrin
d,
part
ing
line
proj
ectio
n,
exce
ssiv
e fla
sh
and
flow
m
arks
.
Dep
th
Wid
th
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
9
Figure 1 - Backrind, unacceptable,W = 0.070" (1.78 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C
8 December 1980
10
Figure 2 - Backrind, unacceptable,W = 0.103" (2.62mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
11
Figure 3 - Backrind, unacceptable,W = 0.103" (2.62 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
12
Figure 4 - Backrind, unacceptable,W = 0.103" (2.62 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
13
Figure 5 - Backrind, acceptable,W = 0.103" (2.62 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
14
Figure 6 - Backrind, acceptable,W = 0.103" (2.62 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
15
Figure 7 - Backrind, unnacceptable,W = 0.139" (3.53 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
16
Figure 8 - Backrind, acceptable,W = 0.139" (3.53 mm.)
Downloaded from http://www.everyspec.com
M I L - S T D - 4 1 3 C8 D e c e m b e r 1 9 8 0
Figure 9 - Back r ind , accep tab le ,W = 0.210” (5.33 mm.)
17
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
18
Figure 10 - Backrind, unacceptable,W = 0.210" (5.33 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
19
Figure 11 - Parting line indentation,acceptable,W = 0.070" (1.78 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
20
Figure 12 - Parting line indentation,acceptable,W = 0.070" (1.78 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
21
Figure 13 - Parting line indentation,acceptable,W = 0.070" (1.78 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
22
Figure 14 - Parting line indentation,unacceptable,W = 0.070" (1.78 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
23
Figure 15 - Parting line indentation,acceptable,W = 0.103" (2.62 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
24
Figure 16 - Parting line indentation,acceptable,W = 0.103" (2.62 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
25
Figure 17 - Parting line indentation,acceptable,W = 0.103" (2.62 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
26
Figure 18 - Parting line indentation,unacceptable,W = 0.103" (2.62 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
27
Figure 19 - Parting line indentation,unacceptable,W = 0.139" (3.53 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
28
Figure 20 - Parting line indentation,unacceptable,W = 0.139" (3.53 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
29
Figure 21 - Parting line indentation,acceptable,W = 0.139" (3.53 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
30
Figure 22 - Parting line indentation,unacceptable,W = 0.139" (3.53 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
31
Figure 23 - Parting line indentation,acceptable,W = 0.210" (5.33 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
32
Figure 24 - Parting line indentation,unacceptable,W = 0.210" (5.33 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
33
Figure 25 - Foreign material,acceptable,W = 0.103" (2.62 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
34
Figure 26 - Foreign material,unacceptable,W = 0.103" (2.62 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
35
Figure 27 - Foreign material,acceptable,W = 0.103" (2.62 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
36
Figure 28 - Foreign material,unacceptable,W = 0.103" (2.62 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
37
Figure 29 - Foreign material,acceptable,W = 0.139" (3.53 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
38
Figure 30 - Foreign material,unacceptable,W = 0.139" (3.53 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
39
Figure 31 - Foreign material,acceptable,W = 0.139" (3.53 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
40
Figure 32 - Foreign material,unacceptable,W = 0.210" (5.33 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
41
Figure 33 - Foreign material,unacceptable,W = 0.275" (6.98 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
42
Figure 34 - Excessive trimming,acceptable,W = 0.103" (2.62 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
43
Figure 35 - Excessive trimming,unacceptable,W = 0.103" (2.62 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
44
Figure 36 - Excessive trimming,acceptable,W = 0.103" (2.62 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
45
Figure 37 - Excessive trimmingunacceptable,W = 0.103" (2.62 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
46
Figure 38 - Excessive trimming,acceptable,W = 0.139" (3.53 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
47
Figure 39 - Excessive trimming,unacceptable,W = 0.139" (3.53 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
48
Figure 40 - Excessive trimming,acceptable,W = 0.210" (5.33 mm.)
Downloaded from http://www.everyspec.com
M I L - S T D - 4 1 3 C8 D e c e m b e r 1 9 8 0
Figure 41 - Excessive t r imming,unacceptable,w = 0.275” (6.98 mm.)
4 9
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
50
Figure 42 - Excessive flash,unacceptable,W = 0.103" (2.62 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413c8 December 1980
51
Figure 43 - Excessive flash,unacceptable,W = 0.103" (2.62 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
52
Figure 44 - Excessive flash,unacceptable,W = 0.103" (2.62 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
53
Figure 45 - Excessive flash,acceptable,W = 0.103" (2.62 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
54
Figure 46 - Excessive flash,acceptable,W = 0.139" (3.53 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
55
Figure 47 - Excessive flash,unacceptable,W = 0.139" (3.53 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
56
Figure 48 - Excessive flash,acceptable,W = 0.139" (3.53 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
57
Figure 49 - Excessive flash,unacceptable,W = 0.139" (3.53 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
58
Figure 50 - Excessive flash,acceptable,W = 0.210" (5.33 mm.)
Downloaded from http://www.everyspec.com
M I L - S T D - 4 1 3 C8 D e c e m b e r 1 9 8 0
Figure 51 - Excess ive f l ash ,unacceptable,W = 0.275” (6.98 mm.)
5 9
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
60
Figure 52 - Non-fill, unacceptable,W = 0.070" (1.78 mm.)
Downloaded from http://www.everyspec.com
M I L - S T D - 4 1 3 C8 D e c e m b e r 1 9 8 0
Figure 53 - N o n - f i l l , u n a c c e p t a b l e ,W = 0 . 1 0 3 ” ( 2 . 6 2 m . )
61
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
62
Figure 54 - Non-fill, acceptable,W = 0.139" (3.53 mm.)
Downloaded from http://www.everyspec.com
M I L - S T D - 4 1 3 C8 D e c e m b e r 1 9 8 0
Figure 55 - N o n - f i l l , u n a c c e p t a b l e ,W= 0.139” (3.53 mm.)
6 3
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
64
Figure 56 - Non-fill, unacceptable,W = 0.139" (3.53 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
65
Figure 57 - Non-fill, unacceptable,W = 0.210" (5.33 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
66
Figure 58 - Non-fill, unacceptable,W = 0.210" (5.33 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
67
Figure 59 - Non-fill, acceptable,
W = 0.275" (6.98 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
68
Figure 60 - Non-fill, unacceptable,W = 0.275" (6.98 mm.)
Downloaded from http://www.everyspec.com
M I L - S T D - 4 1 3 C8 D e c e m b e r 1 9 8 0
Figure 61 - Mo ld depos i t i nden ta t ions , unacceptable,W = 0.070” (1 .78 mm)
6 9
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
70
Figure 62 - Mold deposit indentations,acceptable,W = 0.103" (2.62 mm.)
Downloaded from http://www.everyspec.com
M I L - S T D - 4 1 3 C8 D e c e m b e r 1 9 8 0
Figure 63 - Mo ld depos i t i nden ta t ions ,accep tab le ,w = 0.139” (3.53 mm.)
71
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
72
Figure 64 - Mold deposit indentations,unacceptable,W = 0.139" (3.53 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
73
Figure 65 - Mold deposit indentations,unacceptable,W = 0.139" (3.53 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
74
Figure 66 - Mold deposit indentations,unacceptable,W = 0.139" (3.53 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
75
Figure 67 - Mold deposit indentations,acceptable,W = 0.139" (3.53 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
76
Figure 68 - Mold deposit indentations,acceptable,W = 0.210" (5.33 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
77
Figure 69 - Mold deposit indentations,unacceptable,W = 0.275" (6.98 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
78
Figure 70 - Flow marks, unacceptable,W = 0.070" (1.78 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
79
Figure 71 - Flow marks, unacceptable,W = 0.139" (3.53 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
80
Figure 72 - Flow marks, acceptable,
W = 0.139" (3.53 mm.)
Downloaded from http://www.everyspec.com
M I L - S T D - 4 1 3 C8 D e c e m b e r 1 9 8 0
Figure 73 - Flow marks, unacceptable,W = 0.139” (3.53 mm.)
8 1
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
82
Figure 74 - Flow marks, acceptable,W = 0.139" (3.53 mm.)
Downloaded from http://www.everyspec.com
M I L - S T D - 4 1 3 C8 D e c e m b e r 1 9 8 0
Figure 75 - Flow marks, unacceptable,W = 0.139” (3.53 mm.)
83
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
84
Figure 76 - Flow marks, unacceptable,W = 0.139" (3.53 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
85
Figure 77 - Flow marks, acceptable,W = 0.139" (3.53 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
86
Figure 78 - Flow marks, acceptable,W = 0.210" (5.33 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
87
Figure 79 - Off-register and/or mismatch,unacceptable,W = 0.070" (1.78 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
88
Figure 80 - Off-register and/or mismatch,unacceptable,W = 0.103" (2.62 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
89
Figure 81 - Off-register and/or mismatch,unacceptable,W = 0.139" (3.53 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
90
Figure 82 - Off-register and/or mismatch,acceptable,W = 0.139" (3.53 mm.)
Downloaded from http://www.everyspec.com
91
MIL-STD-413C
8 December 1980
Figure 83 - Off-register and/or mismatch,acceptable,W = 0.139" (3.53 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
92
Figure 84 - Off-register and/or mismatch,acceptable,W = 0.139" (3.53 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
93
Figure 85 - Off-register and/or mismatch,acceptable,W = 0.210" (5.33 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
94
Figure 86 - Off-register and/or mismatch,unacceptable,W = 0.210" (5.33 mm.)
Downloaded from http://www.everyspec.com
MIL-STD-413C8 December 1980
95/96* U.S. GOVERNMENT PRINTING OFFICE: 1988-507-144
Figure 87 - Supplementary illustrations of surface imperfections.
Downloaded from http://www.everyspec.com
Downloaded from http://www.everyspec.com
Downloaded from http://www.everyspec.com