... plated Grade:4-8-10 Material:carbon steel . Pack:carton or bag with pallet Hex nutsSize:M8-M64 standard:DIN,GB ... to customers'requirementOur company mainly produces:hex bolts,hex nuts,socket cap bolts,anchor bolts,tower bolts,dorble-headed bolts,galvanized ... variety of special bolts ,falt washers,spring washers,threaded rod G.I hex nut M20