Hardness : 12.9 Grade
Model | Thread diameter | Head diameter | Head Thickness | Pitch | Hexagon wrench size | Screws length optional (Unit :mm) |
M3 | 3mm | 5.5mm | 3mm | 0.5mm | 2mm | 5/6/8/10/12/14/16/18/20/25/30/35/40/45 |
M4 | 4mm | 7mm | 4.1mm | 0.7mm | 2.5mm | 6/8/10/12/14/16/18/20/25/30/35/40/45/50/60/70/75/80 |
M5 | 5mm | 8.5mm | 5mm | 0.8mm | 3mm | 6/8/10/12/14/16/18/20/25/30/35/40/45/50/55/60/70/75/90/100 |
M6 | 6mm | 10mm | 6mm | 1.0mm | 4mm | 8/10/12/14/16/18/20/25/30/35/40/45/50/55/60/65/70/75/85/90/95/100/120 |
M8 | 8mm | 13mm | 8mm | 1.25mm | 5mm | 10/12/16/18/20/25/30/35/40/45/50/55/60/65/70/80/85/90/100 |
due to the different model, it may have a little different about the thread, please leave a message to us if you want to know the detail about the screws