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Serrated hex flange head cap screws

BN 20170

~DIN 6921

(Standard withdrawn)



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

Alla funktioner


Norm

~DIN 6921 (Standard withdrawn)

Funktioner

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

Illustration functional principle