Serrated lock washers type A, external serrations
BN 779
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M5a; M8a: for hex head screws
标准
DIN 6798 A (Standard withdrawn)
~UNI 8842 A
~ČSN 021745
特点
| Material |
Material
Spring steel
|
| Surface |
Surface
black
|
| Hardness |
Hardness
350-425 HV
|
BN 20231 - DIN 6798 A
Serrated lock washers type A, external serrations - Spring steel - zinc plated with thick layer passivation
BN 781 - DIN 6798 A
Serrated lock washers type A, external serrations - Spring steel - zinc plated blue
BN 80024 - DIN 6798 A
Serrated lock washers type A, external serrations - Spring steel - zinc plated yellow