Butterfly Wing Nut

1. Material: Carbon stell,Q195,Q235,35K,45K, Stainless steelSS304, SS316, SS316L, SS201, SS410
2. Grade:4,8,10, Class 2,5,8.  A2-70, A4-70, A4-80
3. SIZE: M3 to M52
4. Standard: DIN315

DIN315:

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