... : 35K, 40Cr Product details of Silo Bolt1, specification of silo bolt:Diameter of silo bolt could be 1/2", 3 ... 10.9 and 12.9;3, Material of Silo boltAccording to the grade request, the material could 35K ... , 40Cr.4, Surface finish of silo boltAccording the client's need, we could provide the ... plated, black oxide, dacromet;5, Delivery time of Silo boltLike the size of 1/2"*1", we could ...