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Grade 4.8 8.8 10.9 12.9 high strength hex socket button head screws are ideal for use in mechanical and structural applications, providing a secure fastening solution.
Made from high-quality carbon steel, these screws are heat-treated for increased strength and wear resistance. The button head design allows for easy access in tight spaces while providing a smooth, rounded finish for enhanced aesthetics.
| Name | Hex socket head screw bolts | Materials | Carbon Steel/Stainless Steel |
| Standards | DIN ISO ANC BSW JIS etc. | Strength level | 4.8 8.8 10.9 12.9 A2-70 A4-70 A4-80 |
| Size | M3-M50 | Surface finish | ZPHDGBLACKDacromet etc. |
| Length | 15-500 | Samples | Available |
| Thread specification | M3 | M4 | M5 | M6 | M8 | M10 | M12 | M16 | |
| d | |||||||||
| P | pitch | 0.5 | 0.7 | 0.8 | 1 | 1.25 | 1.5 | 1.75 | 2 |
| a | maximum value | 1 | 1.4 | 1.6 | 2 | 2.5 | 3 | 3.5 | 4 |
| minimum | 0.5 | 0.7 | 0.8 | 1 | 1.25 | 1.5 | 1.75 | 2 | |
| dk | maximum value | 5.7 | 7.6 | 9.5 | 10.5 | 14 | 17.5 | 21 | 28 |
| minimum | 5.4 | 7.24 | 9.14 | 10.07 | 13.57 | 17.07 | 20.48 | 27.48 | |
| e ① | minimum | 2.3 | 2.87 | 3.44 | 4.58 | 5.72 | 6.86 | 9.15 | 11.43 |
| k | maximum value | 1.65 | 2.2 | 2.75 | 3.3 | 4.4 | 5.5 | 6.6 | 8.8 |
| minimum | 1.4 | 1.95 | 2.5 | 3 | 4.1 | 5.2 | 6.24 | 8.44 | |
| s | Nominal | 2 | 2.5 | 3 | 4 | 5 | 6 | 8 | 10 |
| maximum value | 2.045 | 2.56 | 3.071 | 4.084 | 5.084 | 6.095 | 8.115 | 10.115 | |
| minimum | 2.02 | 2.52 | 3.02 | 4.02 | 5.02 | 6.02 | 8.025 | 10.025 | |
| t | minimum | 1.04 | 1.3 | 1.56 | 2.08 | 2.6 | 3.12 | 4.16 | 5.2 |
| Minimum tensile load (N) | Level 12.9 | 4910 | 8506 | 13800 | 19600 | 35700 | 56600 | 82400 | 154000 |
Befast’s high-strength hex socket button head screws are ideal for tough applications requiring strength and durability. Available in grades 4.8, 8.8, 10.9, and 12.9, these screws are made from heat-treated carbon steel for maximum performance.
Their hex socket design allows for secure and efficient tightening, while the button head ensures a smooth finish and easy accessibility in tight spaces. These screws are perfect for mechanical and structural applications, offering long-term reliability and resistance to wear.
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