... .surface:zinc plated,phosphated 3.size:M8-M48 4.grade:8.8,10.9,12.Bolts and nuts:Mechanical Properties1, Material: 40 Cr.2 ... .We supply various dimension track shoe bolt ,which are used for caterpillar, komatsu, hitachi, kobelco, daewoo, kato, hyundai, samsung, sumitomo, ... . Can be from TB1/2-TB1.1/4 for English system, from TB12-TB30 for metric system.8-Our advantage: Good quality confirmed by ...