bolts and nuts 1.free sampl 2.partner: Canon 3.over ten years supplier 4.ISO and SGS din 933 stainless steel hex bolt and nut metric thread Material:stainless steel,carbon steelSurface Finish:nickel plated,white zinc,black zinc,color zinc,black oxidemetric and inch sizeStandard:DIN,ISO,JIN,BSSpecification: M4-M156length: <80 mm min Order:100,000 pcstrade term: Ex works,FOB,C&F,CIFsample: free ...