M4X20 8.8 ISO 4762 socket head cap screw DIN 912 Product grades A Zinc plate
This International Standard specifies the characteristics of hexagon socket head cap screws with threads from Ml,6 up to and including M64 and product grade A.
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Mechanical and physical peroperties of bolts,screws and studs | |||||
Mechanical and physical peroperties | Property class | ||||
8.8 | 10.9 | 12.9 | |||
d≦16 mm | d﹥16 mm | ||||
Minimum tensile strength (N/mm2) | min | 800 | 830 | 1040 | 1220 |
Vickers hardness (HV) | min | 250 | 255 | 320 | 385 |
max | 320 | 335 | 380 | 435 | |
Brinell hardness (HB) | min | 238 | 242 | 304 | 366 |
max | 304 | 318 | 361 | 414 | |
Rockwell hardness (HRC) | min | 22 | 23 | 32 | 39 |
max | 32 | 34 | 39 | 44 |