... )Finish:yellow Zinc plating. 3)Standards:SAE,JIC,BSP,NPT,DIN. 4)high quality. Ferrule(Swaged ferrule)We are manufacturing and marketing all ... : Zinc(yellow or white) plating, nickeled. and so on3)Standards: SAE,JIC, BSP, NPT etc.4)application: machinery, transportation, mines, oil ...