Cross hexagon head recessed machine screw flat spring washer assembly
GB9074.13
Diameter range: M3-M10 Length range: 6mm-100mm
| standard | GB national standard |
|---|---|
| head shape | Hexagonal pocket |
| Groove | Cross recess |
| Thread | Fully threaded |
| (mm) | M4 | M5 | M6 | M8 |
|---|---|---|---|---|
| P | 0.7 | 0.8 | 1 | 1.25 |
| e(min) | 7.5 | 8.53 | 10.89 | 14.2 |
| k(max) | 3 | 3.74 | 4.24 | 5.54 |
| k(min) | 2.6 | 3.26 | 3.76 | 5.06 |
| s(max) | 7 | 8 | 10 | 13 |
| s(min) | 6.64 | 7.64 | 9.64 | 12.57 |
| No. | 2 | 2 | 3 | 3 |
| M | 4 | 4.8 | 6.2 | 7.2 |
| t(max) | 1.93 | 2.73 | 2.86 | 3.86 |
| t(min) | 1.4 | 2.19 | 2.31 | 3.24 |
| d1(max) | 3.78 | 4.75 | 5.71 | 7.64 |
| d1(min) | 3.6 | 4.45 | 5.41 | 7.28 |
| h(min) | 1 | 1.2 | 1.5 | 1.9 |
| h(max) | 1.2 | 1.4 | 1.7 | 2.1 |
| b1(min) | 1.4 | 1.9 | 2.35 | 2.85 |
| b1(max) | 1.6 | 2.1 | 2.65 | 3.15 |
| H | 2.75 | 3.25 | 4 | 5 |
| d2(max) | 3.78 | 4.75 | 5.71 | 7.64 |
| d2(min) | 3.66 | 4.57 | 5.53 | 7.42 |
| dc | 9 | 10 | 12 | 16 |
| h1 | 0.8 | 1 | 1.6 | 1.6 |
| project | bolt | washer | washer |
| Standard number | GB/T 29.2 | GB/T 9074.26 | GB/T 9074.24 |
| Cross recess | H type GB/T 944.1 | - | - |
| surface treatment | ①Galvanized passivation GB/T 5267; | ①Galvanized passivation GB/T 5267; | ①Galvanized passivation GB/T 5267; |
| ②Oxidation | ②Oxidation | ②Oxidation | |
| Other technical requirements | The gasket should be able to rotate freely without falling off | The gasket should be able to rotate freely without falling off | The gasket should be able to rotate freely without falling off |
| Acceptance and packaging | GB/T 90 | GB/T 90 | GB/T 90 |
