DIN 797 special foundation bolt [1]standards:DIN 835,DIN 938,DIN797 [2]material:carbon Steel , Stainless steel [3]surface:zi DIN 797 special foundation boltWe also supply hex head bolt, heavy hex structural bolt,hex fit bolt,hex flange bolt,flat countersunk square neck bolts,cup head nid bolts,single-head bolt,double head bolt. DIN 797 special foundation bolt