The product adopts H57 brass bar material, automatic turning in one sequence, subsequent tapping and groove cutting procedures are required, surface roughness Ra3.2, tolerance +/-0.05.
H57 means 57% copper content and the rest zinc content.
The surface is clean, PE bag + carton packaging shipping.
Tiansheng has been developing and producing non-standard fasteners for 12 years. Welcome to customize your products with your drawings/samples.