1. Reasonable & competitive price. 2. High quality & best after-sales service. 3. TS16949 & ISO9001. 4. OEM is available. Specification: Product nameScrew, Different function of Screws BrandWDMaterialCarbon Steel (35#, 45#), Alloy steel (35crmo, 40cr)SizeM3-M40, 1/2"-4"Length5mm-350mmMechanical grade4.8, 5.6, 5.8, 6.8, 8.8, 9.8, 10.9, 12.9 gradeStandardGB, BS, ANSI, JIS, DIN Surface ...