... & Nut, Truck Bolt & Nut, Hub Bolt & Nut, Plow Bolt & Nut, Track Pin & Bushing, King Pin Kits, covering Hino, caterpillar ,Mitsubishi, Fuso ... bolt strengthWe also produce 12.9 class high tensile fasteners by forging. Material:S45/40Cr.Surface:Black oxide, Blue Zinc plating, Trivalent ... and items.Web site:http://www.carelong.com.cn. Manufacture high tensile fasteners/ caterpillar/nissan track bolts