GRADE: 8.8 10.9 12.9 PLATING: CLEAR ZINC (ROHS COMPLIANCE) MATERIAL:Any special material compositions customers requirement. Name: boltMaterial: usually uselenth/size : M1.2-M10Finish abd coating :natural, nickle plated or any coating as per customer specification.Welcome to inquiry us, we are try my best give my best quote for customer. BOLT