Grade:8.8/10.9/12.9 Surface Protection: Black oxide, Phosphate, Zinc plated 1/M2 M3,M5,M5,M7..M9 2/ L:3/5/6/7/...../10 Plastic head screw 1.Complete size M1.6-M9.5; Variety of materials:Carbon steel, Stainless steel,copper; Fine surface trearment: Plain, zinc plated etc.2.Variety of standards:ISO,GB,DIN,JIS,ANSI3.We have passed ISO9001-2000,SGS,ROHS certificate.4.We have a lot of years technical ...