... years supplier 4.partner: Canon stainless steel hex head bolts Material:stainless stell,carbon steel,alloy steelstandard: ... ,Slotted,Phillips/Slot,Six-Lobe, Suqare,Crossed,Y-type,Pozidrivsquare-slot,Phillips/square, Triangle,Double-V, Tri ... Relieving.Manufacturing ProcessHeading/washer assembly/Threading/Secondary machine/heat treatment/plating/Anti-slipping/Baking/QA/Package/ShippingSample ...