... specificationsSize:M6-M64 lenth:1m,2m,3m;5m maxmumstandard:DIN,GB,JIS,ANSI,ASME,NON-STANDARDsurface treatment:electro-galvanized,hot dip galvanized,black ... company mainly produces:hex bolts,hex nuts,socket cap bolts,anchor bolts,tower bolts,dorble-headed bolts,galvanized bolts,and a variety of special bolts ,theaded rods,falt ...