... ,ISO 4.black,zinc plated,HDG,etc din975 din976 stainless steel and carbon steel threaded rod threaded rod 1.various kinds of thread ... steel Q235,A3,40Cr,etc4.surface treatment:black,white blue,zinc nickel Passivation,Galvanized or according to requirement.5.standard: Din, ... ISO,JIS,ANSI,GB and BS.6.packing of threaded rod:general export ...