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Hexalobular socket pan head screw ISO14583 M8X30 Grade 8.8 Zinc plate
This International Standard specifies the characteristics of hexalobular socket pan head screws in product grades A and with thread sizes from M2 up to and including M10.
A hexalobular socket pan head screw with thread M8, nominal length l = 30 mm and property class 8.8 is
designated as follows:
Hexalobular socked pan head screw ISO 14583 - M8 X 30 - 8.8
| 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 | |