Hexagon socket countersunk machine screw
DIN7991
Diameter range: M1.6-M16 Length range: 3mm-160mm
| standard | DIN German standard |
|---|---|
| Groove | Hexagon socket |
| head shape | sunken head |
| Thread | Fully threaded |
| (mm) | M3 | M4 | M5 | M6 | M8 | M10 | M12 | M14 | M16 | M18 | M20 | M22 | M24 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| P | 0.5 | 0.7 | 0.8 | 1 | 1.25 | 1.5 | 1.75 | 2 | 2 | 2.5 | 2.5 | 2.5 | 3 |
| dk(max) | 6 | 8 | 10 | 12 | 16 | 20 | 24 | 27 | 30 | 33 | 36 | 36 | 39 |
| dk(min) | 5.7 | 7.64 | 9.64 | 11.57 | 15.57 | 19.48 | 23.48 | 26.48 | 29.48 | 32.38 | 35.38 | 35.38 | 38.38 |
| e(min) | 2.3 | 2.87 | 3.44 | 4.58 | 5.72 | 6.86 | 9.15 | 11.43 | 11.43 | 13.72 | 13.72 | 16 | 16 |
| k(max) | 1.7 | 2.3 | 2.8 | 3.3 | 4.4 | 5.5 | 6.5 | 7 | 7.5 | 8 | 8.5 | 13.1 | 14 |
| s(min) | 2.02 | 2.52 | 3.02 | 4.02 | 5.02 | 6.02 | 8.025 | 10.025 | 10.025 | 12.032 | 12.032 | 14.032 | 14.032 |
| s(max) | 2.1 | 2.6 | 3.1 | 4.12 | 5.14 | 6.14 | 8.175 | 10.175 | 10.175 | 12.212 | 12.212 | 14.212 | 14.212 |
| t(max) | 1.2 | 1.8 | 2.3 | 2.5 | 3.5 | 4.4 | 4.6 | 4.8 | 5.3 | 5.5 | 5.9 | 8.8 | 10.3 |
| t(min) | 0.95 | 1.55 | 2.05 | 2.25 | 3.2 | 4.1 | 4.3 | 4.5 | 5 | 5.2 | 5.6 | 8.44 | 9.87 |
| steel | Stainless steel | nonferrous metals | ||
| General technical conditions | DIN 267-1 | |||
| Thread | tolerance | 6g | ||
| standard | DIN 13-12、DIN 13-15 | |||
| Mechanical properties | Grade | 8.8 | d≤M20：A2-70； | CuZn = Copper-zinc alloy (CU2, CU3, selected by the manufacturer) |
| d＞M20：A2-50 | ||||
| standard | ISO 898-1 | DIN 267-11 | DIN 267-18 | |
| tolerance | Product grade | A | ||
| standard | ISO 4759-1 | |||
| surface treatment | Blackening (heat or chemical) | without treatment | ||
| Electroplating technology requirements are in accordance with DIN 267-9; | ||||
| If other surface treatment is required, it should be agreed upon by both parties. | ||||
| surface roughness | DIN 267-2 | |||
| surface defects | DIN 267-19 | |||
| Acceptance and packaging | DIN 267-5 | |||
