... Material: 35K, 40Cr Product details of Silo Bolt1, specification of silo bolt:Diameter of silo bolt could be 1/2", 3/8", 5/8 ... bolt could be 1", 1-1/4", 2", 4",6"2, Grade of silo bolt:This could be 8.8 and above like ... plated, black oxide, dacromet;5, Delivery time of Silo boltLike the size of 1/2"*1", we could finish 600000pcs per month. Silo ...