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With a smooth, rounded head and square neck design, they provide a secure and tamper-proof fastening solution.
Befast offers Grade 4.8 Carriage Bolts made with high-quality materials, ensuring dependable performance and a long lifespan. Our products are engineered for stability and safety in various applications.
| Name | Carriage 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 | M5 | M6 | M8 | M10 | M12 | M16 | M20 | |
| d | ||||||||
| P | pitch | 0.8 | 1 | 1.25 | 1.5 | 1.75 | 2 | 2.5 |
| b | L≤125 | 16 | 18 | twenty two | 26 | 30 | 38 | 46 |
| 125＜L≤200 | twenty two | twenty four | 28 | 32 | 36 | 44 | 52 | |
| L>200 | - | - | 41 | 45 | 49 | 57 | 65 | |
| dk | maximum value | 13.55 | 16.55 | 20.65 | 24.65 | 30.65 | 38.8 | 46.8 |
| minimum | 12.45 | 15.45 | 19.35 | 23.35 | 29.35 | 37.2 | 45.2 | |
| ds | maximum value | 5 | 6 | 8 | 10 | 12 | 16 | 20 |
| minimum | 4.52 | 5.52 | 7.42 | 9.42 | 11.3 | 15.3 | 19.16 | |
| k 1 | maximum value | 4.1 | 4.6 | 5.6 | 6.6 | 8.75 | 12.9 | 15.9 |
| minimum | 2.9 | 3.4 | 4.4 | 5.4 | 7.25 | 11.1 | 14.1 | |
| k | maximum value | 3.3 | 3.88 | 4.88 | 5.38 | 6.95 | 8.95 | 11.05 |
| minimum | 2.7 | 3.12 | 4.12 | 4.62 | 6.05 | 8.05 | 9.95 | |
| r 1 | ≈ | 10.7 | 12.6 | 16 | 19.2 | 24.1 | 29.3 | 33.9 |
| r 2 | maximum value | 0.5 | 0.5 | 0.5 | 0.5 | 1 | 1 | 1 |
| r 3 | maximum value | 0.75 | 0.9 | 1.2 | 1.5 | 1.8 | 2.4 | 3 |
| s | maximum value | 5.48 | 6.48 | 8.58 | 10.58 | 12.7 | 16.7 | 20.84 |
| minimum | 4.52 | 5.52 | 7.42 | 9.42 | 11.3 | 15.3 | 19.16 | |
| Thousand pieces of steel weight ≈kg | - | - | - | - | - | - | - | |
| thread length b | - | - | - | - | - | - | - | |
Befast’s Grade 4.8 Carriage Bolts are designed for ease of installation and secure fastening. Their unique square neck design prevents rotation, ensuring a stable and strong hold. With an affordable price point and high tensile strength, they are ideal for projects that require reliable fasteners.
Our bolts undergo rigorous testing to ensure consistent quality, and with bulk ordering options, you can count on Befast for all your fastener needs.
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