Serrated hex flange head cap screws fully threaded
BN 20170
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規範
~DIN 6921 (Standard withdrawn)
產品資訊
| 頭形 |
頭形
Hexagonal with flange
|
| 穴型 |
穴型
Hexagon
|
| 螺紋 |
螺紋
fully threaded
|
| Material |
Material
Steel
|
| 強度等級 |
強度等級
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