... 4-delivery in bulldozer track shoe bolt 1. material:Carbon steel,Alloy steel,stainless steel2. grade of HEX BOLT:Metric standerd: Grade4 ... ,8.8,etc.Grade2,5,8,10,etc.MaterialLow carbon steel, stainless steel,alloy steelFinishBright,zinc,plated,hot-dip galvanized,mechanicl plating ...