self tapping screw standards
TRANSCRIPT
Self-Tapping Screws
Manufacturing Standards for Head Tolerances
*Maxcountersunkheaddiametersaretheoreticaldiametersofheadtosharpcornersandarethediametertowhichholesshouldbecountersunktoenablethescrewheadstofitflushwiththesurface.
Tolerances to BS 4174
Tolerances to DIN 267
Tolerances to ISO 4759/1
TECHNICAL DATA 1
DEPTHREF
Self Tapping ScrewsGimlet PointGimlet point self-tapping screws have various references depending on the standard.BS 4174 referred to as Type ABDIN 7970 referred to as Type BISO 1478 referred to as Type C
Self Tapping ScrewsBlunt PointBlunt point self-tapping screws have various references depending on the standard.BS 4174 referred to as Type BDIN 7970 referred to as Type BZISO 1478 referred to as Type F
158Web www.lancasterfastener.co.ukEmail [email protected]
Tel + 44 (0) 1524 389232Fax + 44 (0) 1524 66367
CD W
ELD STU
DS
FASTEN
ERS FOR
SHEET M
ETAL
SCREWS FO
R PLASTIC
ROLLED
THREA
D
MA
CHIN
E SCREWS
DIN
7500 THREA
D RO
LLING
SCREW
SD
IN 7504 SELF-D
RILLING
SCREW
SSELF-TA
PPING
SCREWS
TECHN
ICAL D
ATAB
RASS IN
SERTS FO
R PLASTIC
Self-Tapping Screws
Manufacturing Standards for Thread, Length Tolerances and Mechanical Properties
TECHNICAL DATA 1
Dimensions in Millimetres
Self Tapping ScrewsGimlet PointGimlet point self-tapping screws have various references depending on the standard.BS 4174 referred to as Type ABDIN 7970 referred to as Type BISO 1478 referred to as Type C
Self Tapping ScrewsBlunt PointBlunt point self-tapping screws have various references depending on the standard.BS 4174 referred to as Type BDIN 7970 referred to as Type BZISO 1478 referred to as Type F
159Tel + 44 (0) 1524 389232Fax + 44 (0) 1524 66367
Web www.lancasterfastener.co.ukEmail [email protected]
SELF
-TA
PPIN
GSC
REW
SD
IN 7
504
SELF
-DRI
LLIN
G
SCRE
WS
DIN
750
0 TH
REA
D R
OLL
ING
SC
REW
SRO
LLED
TH
REA
D
MA
CHIN
E SC
REW
SSC
REW
S FO
R PL
AST
ICFA
STEN
ERS
FOR
SH
EET
MET
AL
CD W
ELD
STU
DS
TECH
NIC
AL
DAT
AB
RASS
INSE
RTS
FO
R PL
AST
IC
Self-Tapping Screws
Recommended Hole Sizes
Duetothevarietyofthehardnessofmetalsandthedifferentoperatingconditions,itmaybefoundnecessarytovarythesedimensionswhichshouldbeusedonlyasaguide.
TECHNICAL DATA 1
160Web www.lancasterfastener.co.ukEmail [email protected]
Tel + 44 (0) 1524 389232Fax + 44 (0) 1524 66367
CD W
ELD STU
DS
FASTEN
ERS FOR
SHEET M
ETAL
SCREWS FO
R PLASTIC
ROLLED
THREA
D
MA
CHIN
E SCREWS
DIN
7500 THREA
D RO
LLING
SCREW
SD
IN 7504 SELF-D
RILLING
SCREW
SSELF-TA
PPING
SCREWS
TECHN
ICAL D
ATAB
RASS IN
SERTS FO
R PLASTIC
Type U Hammer Drive Screws
Head, Thread and Length Tolerances
TECHNICAL DATA 2
Dimensions in Inches
Dimensions in Millimetres
ManufacturingStandardBS4174
161Tel + 44 (0) 1524 389232Fax + 44 (0) 1524 66367
Web www.lancasterfastener.co.ukEmail [email protected]
SELF
-TA
PPIN
GSC
REW
SD
IN 7
504
SELF
-DRI
LLIN
G
SCRE
WS
DIN
750
0 TH
REA
D R
OLL
ING
SC
REW
SRO
LLED
TH
REA
D
MA
CHIN
E SC
REW
SSC
REW
S FO
R PL
AST
ICFA
STEN
ERS
FOR
SH
EET
MET
AL
CD W
ELD
STU
DS
TECH
NIC
AL
DAT
AB
RASS
INSE
RTS
FO
R PL
AST
IC