Spring washer:
1: Usage: For screw
2, Size: The size from M2-M42.
3, Material: The material can be steel, sus304 316(A2, A4), 65MN, etc.
4: Treatment: Zinc plated(yellow, bule, white), hot dip galvanization, oxide black, plain, etc
5, standard: DIN127B, DIN128A, DIN128B, DIN7980, ASME, JIS1251, etc...
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