12MM_X_7_3/4" THIS BOLT WILL NOT LOOK LIKE THE ORIDGINAL 1969 THRU 1971 AXLE BOLTS DID, AS HONDA HAS SUPERCEEDED IT A FEW TIMES. IT WILL WORK FINE, BUT NO COTTOR PIN HOLE AND THE HEAD IS HEX. THIS REQUIRES OUR 43D SELF LOCKING NUT 71D @ *SELF_LOCKING_NUT FRONT_AND REAR_AXLE ALL_Z50A'S 12MM SOME_CT70K0'S 90353-045-000 1/22M (43D) THIS IS THE SELF LOCKING STYLE USED ON ALL Z50A'S (NO COTTOR KEY) SOME OF THE CT70'S USED THIS AXIL NUT OTHERS USED OUR #(69H) WHICH TOOK A COTTOR KEY 43D