Hexagon socket head machine screws
GB70.1
Diameter range: M1.4-M486 Length range: 3mm-580mm
| standard | GB national standard |
|---|---|
| Groove | Hexagon socket |
| head shape | cylinder |
| Thread | Partial / Full Thread |
| (mm) | M1.6 | M2 | M2.5 | M3 | M4 | M5 | M6 | M8 | M10 | M12 | M14 | M16 | M20 | M24 | M30 | M36 | M42 | M48 | M56 | M64 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| P | 0.35 | 0.4 | 0.45 | 0.5 | 0.7 | 0.8 | 1 | 1.25 | 1.5 | 1.75 | 2 | 2 | 2.5 | 3 | 3.5 | 4 | 4.5 | 5 | 5.5 | 6 |
| dk(max) | 3 | 3.8 | 4.5 | 5.5 | 7 | 8.5 | 10 | 13 | 16 | 18 | 21 | 24 | 30 | 36 | 45 | 54 | 63 | 72 | 84 | 96 |
| dk(min) | 2.86 | 3.62 | 4.32 | 5.32 | 6.78 | 8.28 | 9.78 | 12.73 | 15.73 | 17.73 | 20.67 | 23.67 | 29.67 | 35.61 | 44.61 | 53.54 | 62.54 | 71.54 | 83.46 | 95.46 |
| da(max) | 2 | 2.6 | 3.1 | 3.6 | 4.7 | 5.7 | 6.8 | 9.2 | 11.2 | 13.7 | 15.7 | 17.7 | 22.4 | 26.4 | 33.4 | 39.4 | 45.6 | 52.6 | 63 | 71 |
| e(min) | 1.733 | 1.733 | 2.303 | 2.873 | 3.443 | 4.583 | 5.723 | 6.683 | 9.149 | 11.429 | 13.716 | 15.996 | 19.437 | 21.734 | 25.154 | 30.854 | 36.571 | 41.131 | 46.831 | 52.531 |
| k(max) | 1.6 | 2 | 2.5 | 3 | 4 | 5 | 6 | 8 | 10 | 12 | 14 | 16 | 20 | 24 | 30 | 36 | 42 | 48 | 56 | 64 |
| k(min) | 1.46 | 1.86 | 2.36 | 2.86 | 3.82 | 4.82 | 5.7 | 7.64 | 9.64 | 11.57 | 13.57 | 15.57 | 19.48 | 23.48 | 29.48 | 35.38 | 41.38 | 47.38 | 55.26 | 63.26 |
| r(min) | 0.1 | 0.1 | 0.1 | 0.1 | 0.2 | 0.2 | 0.25 | 0.4 | 0.4 | 0.6 | 0.6 | 0.6 | 0.8 | 0.8 | 1 | 1 | 1.2 | 1.6 | 2 | 2 |
| s(max) | 1.58 | 1.58 | 2.08 | 2.58 | 3.08 | 4.095 | 5.14 | 6.14 | 8.175 | 10.175 | 12.212 | 14.212 | 17.23 | 19.275 | 22.275 | 27.275 | 32.33 | 36.33 | 41.33 | 46.33 |
| s(min) | 1.52 | 1.52 | 2.02 | 2.52 | 3.02 | 4.02 | 5.02 | 6.02 | 8.025 | 10.025 | 12.032 | 14.032 | 17.05 | 19.065 | 22.065 | 27.065 | 32.08 | 36.08 | 41.08 | 46.08 |
| t(min) | 0.7 | 1 | 1.1 | 1.3 | 2 | 2.5 | 3 | 4 | 5 | 6 | 7 | 8 | 10 | 12 | 15.5 | 19 | 24 | 28 | 34 | 38 |
| steel | Stainless steel | nonferrous metals | ||
| General technical conditions | GB/T 16938 | |||
| Thread | tolerance | 12.9: 5g6g; | ||
| Other grades: 6g | ||||
| standard | GB/T 196、GB/T 197 | |||
| Mechanical properties | Grade | d＜3mm: according to the agreement; | d≤24mm：A2-70a、A4-70、A5-70、A3-70； | CU2、CU3 |
| 3mm≤d≤39mm: 8.8, 10.9, 12.9; | 24mm＜d≤39mm：A2-50b、A4-50、A5-50、A3-50； | |||
| d＞39mm: According to the agreement | d＞39mm: According to the agreement | |||
| standard | GB/T 3098.1 | GB/T 3098.6 | GB/T 3098.10 | |
| tolerance | Product grade | A | ||
| standard | GB/T 3103.1 | |||
| surface treatment | oxidation; | Simple handling | Simple handling; | |
| Electroplating technical requirements shall comply with GB/T 5267.1; | Electroplating technical requirements according to GB/T 5267.1 | |||
| Technical requirements for non-electrolytic zinc flake coating according to GB/T 5267.2 | ||||
| surface defects | 12.9 level: GB/T 5779.3; | |||
| Other grades: GB/T 5779.1 | ||||
| Acceptance and packaging | GB/T 90.1、GB/T 90.2 | |||
