... -sales service. 3. TS16949 & ISO9001. 4. OEM is available. Specification: Product name Different function of Screws BrandWDMaterialCarbon Steel (35#, 45#), Alloy steel ... .8, 9.8, 10.9, 12.9 gradeStandardGB, BS, ANSI, JIS, DIN Surface treatmentBlack oxide, Zinc plated, hot galvanized, plated dacromet ... to your special drawings or samples.2. Non-standard product is available. Different function of Screws