NSC-3-6-CP2 NBK Steel Set Collar with Installation Hole - Set Screw Type - NBK - One Collar Made in JapanNSC 3 6 SP2 NBK Steel Set Collar with Installation Hole Set Screw Type Main body Ferrous ferric Oxide S45C Film (Black) Hex Socket Set Screw Ferrous ferric Oxide SCM435 Film (Black) NBK Made in Japan Characteristics: Set collar with installation hole. It can be installed to any machine and device such as wheels, flanges and plates, by using the fixing hole. It is attached to the shaft by the set screws. Part Number d B D S P M* 1 NSC 3 6 SP2 NBK 3mm