stainless bolts 1.ISO9001:2008 2.free sample 3.over ten years supplier 4.partner: Canon stainless steel hex head bolts Material:stainless stell,carbon steel,alloy steelstandard:according to the drawingSize:dia:M4-M30 length: <80mm Grade:4.8,6.8,8.8,10.9,12.9Surface:black zinc,parkerising,chrom plated and oxide coatingCertificate:ISO9001:2000The products have good after-sale serice,high quality, ...