... 3.free sample,more than 10 years supplier 4.SGS,Rohs Hex Machine Screw Nuts — 18-8 Stainless Steel, CoarseMaterial ... ,DIN,JIS,ANSI,BSWManufacture ProcessHeading/washer assembly/Threading/Secondary machine/heat treatment/plating/Anti-slipping/Baking/QA/Package/ShippingSample ... only offering good nut products but also offering chipboard Screw, machine Screw , wood Screw, Self Tapping Screw. Our excellent ...