High-Strength Bolt&Nut for Track Shoe/Roller/Segment/Sprocket 1.Materials: low carbon alloy ... the pharmaceutical industry, pharmaceutical plants and steel boiler steel. System metallurgical plants, railway bridges, airport hangar, port machinery, ... , BSWFinishPlain, Galvanized, Black, Nickel, Chrome, H.D.GPackingCarton, Box, Bag, PalletQuality AssuranceISO 9001Our bolts and assembly products are used ...