items:ansi/asme,astm:3/4"~4", nuts:astm a194 2h,a194 2hm,a194 7,a194 7m,a194 8,a194 8m bolts: astm a193 b7,a193 b7m,a193 b16,a193 b8,a193 b8m rods,socket hex bolt,hexagon bolts,eyebolts,uni 5587,uni 5588,uni 5931,uni 5737 specification:m8~m48 3/4"~4" surface treatment:zinking(zn) nickel coating(ni) cadmium coating(cad) teflon coating(ptfe) blackout application range: pressure vessel, valve and flange pipeline connection under the high temperature