Hex head Partially Threaded bolts with zinc plated 1,Products DetailesMaterial1.Stainless Steel: SS201, SS303, SS304, ... 4.Bronze: C51000, C52100, C54400, etc5.Iron: 1213, 12L14,12156.Aluminum: Al6061, Al6063 etc7,.Carbon steel: C1006,C1010, ... : SCM435,10B21Specification& gaugeM0.8-M10Surface FinishingZn- Plated,Ni-plated,Passivated,Tin-plated,Sandblast and Anodize,Chromate, Polish,Electro Painting, ...