DIN 931 Partially Threaded Hex Bolt
DIN 931 partially threaded hex bolts for mechanical/structural joints with stainless or steel options.
Product Description
DIN 931 partially threaded hex bolts have a hex head and a smooth shank with partial threading.
They are used in mechanical assemblies and structures where a smooth shank improves alignment and shear performance.
Choose SS201/304/316/316L for corrosion resistance or steel for cost optimization.
Technical Drawing
Technical Specifications
| d | M4 | M5 | M6 | M8 | M10 | M12 | M14 | M16 |
|---|---|---|---|---|---|---|---|---|
| P | 0.7 | 0.8 | 1 | 1.25 | 1.5 | 1.75 | 2 | 2 |
| k | 2.8 | 3.5 | 4 | 5.3 | 6.4 | 7.5 | 8.8 | 10 |
| s | 7 | 8 | 10 | 13 | 17 | 19 | 22 | 24 |
| b1, L≤125 | 14 | - | 18 | 22 | 26 | 30 | 34 | 38 |
| b2, 125<L≤200 | - | 22 | 24 | 28 | 32 | 36 | 40 | 44 |
| b3, L>200 | - | - | - | - | - | - | - | 57 |
| d | M18 | M20 | M22 | M24 | M27 | M30 | M33 | M36 |
|---|---|---|---|---|---|---|---|---|
| P | 2.5 | 2.5 | 2.5 | 3 | 3 | 3.5 | 3.5 | 4 |
| k | 11.5 | 12.5 | 14 | 15 | 17 | 18.7 | 21 | 22.5 |
| s | 27 | 30 | 32 | 36 | 41 | 46 | 50 | 55 |
| b1, L≤125 | 42 | 46 | 50 | 54 | 60 | 66 | 72 | 78 |
| b2, 125<L≤200 | 48 | 52 | 56 | 60 | 66 | 72 | 78 | 84 |
| b3, L>200 | 61 | 65 | 69 | 73 | 79 | 85 | 91 | 97 |
| d | M39 | M42 | M45 | M48 | M52 | M56 |
|---|---|---|---|---|---|---|
| P | 4 | 4.5 | 4.5 | 5 | 5 | 5.5 |
| k | 25 | 26 | 28 | 30 | 33 | 35 |
| s | 60 | 65 | 70 | 75 | 80 | 85 |
| b1, L≤125 | 84 | 90 | 96 | 102 | - | - |
| b2, 125<L≤200 | 90 | 96 | 102 | 108 | 116 | 124 |
| b3, L>200 | 103 | 109 | 115 | 121 | 129 | 137 |
