Serrated hex flange head cap screws fully threaded
BN 20170
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規範
~DIN 6921 (Standard withdrawn)
產品資訊
| Headform |
Headform
Hexagonal with flange
|
| Drive |
Drive
Hexagon
|
| Thread |
Thread
fully threaded
|
| Material |
Material
Steel
|
| Property class |
Property class
8.8
|
| Surface |
Surface
zinc plated blue
|
Functional principle
1. Tightening: teeth penetrate the surface
2. Loosening: teeth shear off material
3. Surface condition after loosening