Hexagon head bolts with holes
GB32.1
Diameter range: M6-M30 Length range: 12mm-100mm
| standard | GB national standard |
|---|---|
| head shape | Hexagonal hole |
| Thread | Fully threaded |
Type A
| (mm) | M6 | M8 | M10 | M12 | M14 | M16 | M18 | M20 | M22 | M24 |
|---|---|---|---|---|---|---|---|---|---|---|
| P | 1 | 1.25 | 1.5 | 1.75 | 2 | 2 | 2.5 | 2.5 | 2.5 | 3 |
| da(max) | 6.8 | 9.2 | 11.2 | 13.7 | 15.7 | 17.7 | 20.2 | 22.4 | 24.4 | 26.4 |
| e(min) | 11.05 | 14.38 | 17.77 | 20.03 | 23.35 | 26.75 | 30.14 | 33.53 | 37.72 | 39.98 |
| k(min) | 3.85 | 5.15 | 6.22 | 7.32 | 8.62 | 9.82 | 11.28 | 12.28 | 13.78 | 14.78 |
| k(max) | 4.15 | 5.45 | 6.58 | 7.68 | 8.98 | 10.18 | 11.72 | 12.72 | 14.22 | 15.22 |
| r(min) | 0.25 | 0.4 | 0.4 | 0.6 | 0.6 | 0.6 | 0.6 | 0.8 | 1 | 0.8 |
| s(max) | 10 | 13 | 16 | 18 | 21 | 24 | 27 | 30 | 34 | 36 |
| s(min) | 9.78 | 12.73 | 15.73 | 17.73 | 20.67 | 23.67 | 26.67 | 29.67 | 33.38 | 35.38 |
| d1(min) | 1.6 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 3 |
| d1(max) | 1.85 | 2.25 | 2.25 | 2.25 | 2.25 | 3.25 | 3.25 | 3.25 | 3.25 | 3.25 |
Type B
| (mm) | M6 | M8 | M10 | M12 | M14 | M16 | M18 | M20 | M22 | M24 | M27 | M30 | M36 | M42 | M48 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| P | 1 | 1.25 | 1.5 | 1.75 | 2 | 2 | 2.5 | 2.5 | 2.5 | 3 | 3 | 3.5 | 4 | 4.5 | 5 |
| da(max) | 6.8 | 9.2 | 11.2 | 13.7 | 15.7 | 17.7 | 20.2 | 22.4 | 24.4 | 26.4 | 30.4 | 33.4 | 39.4 | 45.6 | 52.6 |
| e(min) | 10.89 | 14.2 | 17.59 | 19.85 | 22.78 | 26.17 | 29.56 | 32.95 | 37.29 | 39.55 | 45.2 | 50.85 | 60.79 | 72.02 | 82.6 |
| k(min) | 3.76 | 5.06 | 6.11 | 7.21 | 8.51 | 9.71 | 11.15 | 12.15 | 13.65 | 14.65 | 16.65 | 18.28 | 22.08 | 25.58 | 29.58 |
| k(max) | 4.24 | 5.54 | 6.69 | 7.79 | 9.09 | 10.29 | 11.85 | 12.85 | 14.35 | 15.35 | 17.35 | 19.12 | 22.92 | 26.42 | 30.42 |
| r(min) | 0.25 | 0.4 | 0.4 | 0.6 | 0.6 | 0.6 | 0.6 | 0.8 | 1 | 0.8 | 1 | 1 | 1 | 1.2 | 1.6 |
| s(max) | 10 | 13 | 16 | 18 | 21 | 24 | 27 | 30 | 34 | 36 | 41 | 46 | 55 | 65 | 75 |
| s(min) | 9.64 | 12.57 | 15.57 | 17.57 | 20.16 | 23.16 | 26.16 | 29.16 | 33 | 35 | 40 | 45 | 53.8 | 63.8 | 73.1 |
| d1(min) | 1.6 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 4 | 4 | 4 |
| d1(max) | 1.85 | 2.25 | 2.25 | 2.25 | 2.25 | 3.25 | 3.25 | 3.25 | 3.25 | 3.25 | 3.25 | 3.25 | 4.3 | 4.3 | 4.3 |
| steel | Stainless steel | nonferrous metals | ||
| General technical conditions | GB/T 16938 | |||
| Thread | tolerance | 6g | ||
| standard | GB/T 193、GB/T 9145 | |||
| Mechanical properties | Grade | 6mm≤d≤39mm: 5.6, 8.8, 10.9; | d≤24mm：A2-70、A4-70； | CU2、CU3、AL4 |
| d＞39mm: According to the agreement | 24mm＜d≤39mm：A2-50、A4-50； | |||
| d＞39mm: According to the agreement | ||||
| standard | 6mm≤d≤39mm：GB/T 3098.1； | d≤39mm：GB/T 3098.6； | GB/T 3098.10 | |
| d＞39mm: According to the agreement | d＞39mm: According to the agreement | |||
| tolerance | Product grade | d≤24mm and l≤10d or l≤150mm (whichever is smaller): A | ||
| d＞24mm or l＞10d or l＞150mm (whichever is smaller): B | ||||
| standard | GB/T 3103.1 | |||
| surface treatment | Without treatment; | Simple handling; | Simple handling; | |
| Electroplating technical requirements shall comply with GB/T 5267.1; | Passivation treatment technical requirements according to GB/T 5267.4 | Electroplating technical requirements according to GB/T 5267.1 | ||
| Technical requirements for non-electrolytic zinc flake coating according to GB/T 5267.2 | ||||
| If other technical requirements or surface treatment are required, it should be agreed upon by the supplier and the buyer. | ||||
| surface defects | GB/T 5779.1 | - | ||
| wire hole | GB/T 5278 | |||
| Acceptance and packaging | GB/T 90.1、GB/T 90.2 | |||
