... rod material,ss304,ss316,40Cr,etc 3.SGS,ISO 4.black,zinc plated,HDG,etc din975 din976 stainless steel and carbon ... steel threaded rod threaded rod 1.various kinds of thread rod available.2.high quality competive price ... .3.material of thread rod:stainless steel S304,SS316,SS201 ,carbon steel Q235,A3,40Cr,etc4.surface treatment ...