Cross small pan head machine screw flat spring washer assembly
GB9074.8
Diameter range: M2-M10 Length range: 4mm-150mm
| standard | GB national standard |
|---|---|
| head shape | small pantou |
| Groove | Cross recess |
| Thread | Fully threaded |
| (mm) | M2.5 | M3 | M4 | M5 | M6 |
|---|---|---|---|---|---|
| P | 0.45 | 0.5 | 0.7 | 0.8 | 1 |
| dk(max) | 4.5 | 5.5 | 7 | 9 | 10.5 |
| dk(min) | 4.2 | 5.2 | 6.64 | 8.64 | 10.07 |
| k(max) | 1.8 | 2.15 | 2.75 | 3.45 | 4.1 |
| k(min) | 1.66 | 2.01 | 2.61 | 3.27 | 3.8 |
| No. | 1 | 2 | 2 | 2 | 3 |
| M | 2.6 | 3.5 | 4.1 | 4.8 | 6.2 |
| t(max) | 1.42 | 1.43 | 2.03 | 2.73 | 2.86 |
| t(min) | 1 | 0.86 | 1.45 | 2.14 | 2.26 |
| d1(max) | 2.34 | 2.83 | 3.78 | 4.75 | 5.71 |
| d1(min) | 2.2 | 2.69 | 3.6 | 4.45 | 5.41 |
| h(min) | 0.52 | 0.7 | 1 | 1.2 | 1.5 |
| h(max) | 0.68 | 0.9 | 1.2 | 1.4 | 1.7 |
| b1(min) | 0.9 | 1.1 | 1.4 | 1.9 | 2.35 |
| b1(max) | 1.1 | 1.3 | 1.6 | 2.1 | 2.65 |
| H(max) | 1.5 | 2 | 2.75 | 3.25 | 4 |
| H(min) | 1.2 | 1.6 | 2.2 | 2.6 | 3.2 |
| d2(max) | 2.34 | 2.83 | 3.78 | 4.75 | 5.71 |
| d2(min) | 2.24 | 2.73 | 3.66 | 4.57 | 5.53 |
| dc(max) | 6 | 7 | 9 | 10 | 12 |
| dc(min) | 5.7 | 6.64 | 8.64 | 9.64 | 11.57 |
| h1(min) | 0.45 | 0.45 | 0.7 | 0.9 | 1.4 |
| h1(max) | 0.55 | 0.55 | 0.9 | 1.1 | 1.8 |
| project | screws | washer | washer |
| Standard number | GB/T 823 | 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 |
