Is a screw category, and the difference between stainless steel screws is mainly on the pitch. And the surface hardness of self-tapping screws has a high hardness, and is often used for the connection of metal plates.
The commonly used type of stainless steel self tapping screw and the corresponding GB standard are mainly discussed today.
1. Cross recessed panhead self-tapping screws (pan head cross-tapping screws) GB/T 845
2. Cross recess countersunk head tapping screws (sink countersunk cross tapping screws) GB/T 846
3, cross recessed countersunk head tapping screws (half countersunk cross tapping screws) GB/T 847
4. Hexagonal Flower Shaped Pan Head Self-tapping Screws (Pan Head Hexagon Flower Shaped Self-tapping Screw) GB/T2670.1
5, Hexagon flower countersunk head self-tapping screws (sink head Hexagon flower self-tapping screws) GB/T2670.2
6. Hexagonal flower-shaped semi-sinking self-tapping screws (half-sinking Hexagonal flower self-tapping screws) GB/T2670.2
7, slotted pan head tapping screws GB/T5282
8, slotted countersunk head tapping screws GB/T5283
9, slotted countersunk head tapping screws GB/T5284
10. Hexagon head tapping screw GB/T5285
11. Cross recessed pan head self-tapping locking screw GB/T6560
12, cross recess countersunk head locking screws GB/T6561
13, cross recessed countersunk head countersunk locking screws GB/T6562
14. Hexagon head self-tapping locking screw (triangle tooth self-tapping locking screw) GB/T6563
15. Hexagonal flower-shaped cylindrical head self-tapping locking screw GB/T6564
16. Self-drilling self-drilling screws for cross recessed pan head GB/T15856.1
17. Self-drilling self-drilling screws for cross recessed countersunk heads GB/T15856.2
18、Self-drilling self-drilling screws for cross recessed semi-deep heads GB/T15856.3
19, hexagonal self-drilling self-tapping screw flange surface GB/T15856.4
20, hexagonal flange self-tapping screws GB/T16824.2
21, wall plate self-tapping screws GB/T14210