stud bolt Material: carbon steel,stainless steel Surface: Zinc plated,HDG,Plain Standard:BS,ANSI,DIN Size:M4-M42 stud boltMaterial: carbon steel,stainless steelSurface: Zinc plated,HDG,PlainStandard:BS,ANSI,DINSize:M4-M42 stud bolt,threaded rod,thread bar