metric bolts grades - aall american fasteners...product specification class 4.6 class 5.8 class 8.8...
TRANSCRIPT
www.AallAmericanFasteners.com
Illustrations Courtesy of the www.FastenerBlackBook.com - METRIC Edition
common WoRKSHoP BoLTS IDEnTIFIcATIon
INCH Edition METRIC Edition
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ISO9001:2008
QUALITY
Common METRIC Steel Bolts
Identification Mark4.6
X*
5.8
X*
8.8
X*
10.9
X*
or 12.9
12.9
M X*
Product Specification Class 4.6 Class 5.8 Class 8.8 Class 10.9 Class 12.9 Socket Head Cap Screw
Material Low/Medium Carbon Steel
Low/Medium Carbon Steel Heat Treated
Medium CarbonSteel Heat Treated
Alloy SteelHeat Treated
Alloy SteelHeat Treated
Tensile Strength Minimum 400 MPa(58000 psi)
520 MPa(75000 psi)
830 MPa(120000 psi)
1040 MPa(150000 psi)
1220 MPa(176000 psi)
Yield Strength Minimum 240 MPa 420 MPa 640 MPa 940 MPa 1100 MPa
Proof Load 220 MPa 380 MPa 600 MPa 830 MPa 970 MPa
HardnessMin HRB-67 HRB-82 HRC-22 HRC-32 HRC-39
Max HRB-95 HRB-95 HRC-34 HRC-39 HRC-44
Compatible Nut Class 5 Class 5 Class 8 Class 10 –
*Approximate Equivalent INCH / METRIC BoltsX*
= 5.8
X* X*
= 8.8
X* X*
= 10.9
X*
= 12.9
M X*
Grade 2 Class 5.8 Grade 5 Class 8.8 Grade 8 Class 10.9 ASTM-A574X* = Manufacturer’s Identification * Based on material tensile strength