Shanghai Summery Industrial Machine Co. , Ltd.
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Head Bolt M6X20 8.8 ISO 4017 DIN 933 Zinc plate Product grades A
This International Standard specifies the characteristics of hexagon head screws with threads from M1,6
up to and including M64, of product grade A for threads M1,6 to M24 and nominal lengths up to and
including 10 d or 150 mm,whichever is shorter, and product grade B for threads over M24 or nominal
lengths over 10 d or 150 mm, whichever is shorter.
Shanghai summery industrial machine Co.,Ltd was established in 2006,it is located at Shanghai,which is the most vigorous city in world.
If you are looking for flange head screws, please contact us for further information.
| 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 | |