The precision stamping parts are rings, which are the protective shell in the automitive. The material is SPCC, and the surface roughness is Ra 1.6. The difficulty of this round stamping parts is the ID tolerance, it is only +/-0.015mm. For this steel stamping parts, MOQ is 10,000 PCS and the lead time is 30 days. JST has made many precision round stamping parts, and we have over 10 years experience in this filed. If you have any RFQs for round steel stamping parts, please do feel free to contact us for quotation.