304 stainless steel GB93 standard spring washer

1. Standard spring washers are highly wear-resistant and corrosion-resistant, do not rust in damp environments, and have strong oxidation resistance.
2. 304 stainless steel, beautiful and practical, with high hardness and no deformation
3. Exquisite matching, increasing vertical tension, and providing a more secure and firm lock
4. Standard concentricity, smooth surface, concentric and circular