SOME SHOW SIGNS OF BEING ON THE SHELF FOR 40 YEARS!!! SWING ARM BOLT NOT MEASURING HEX PART 10mm X 9 1/16" 17mm hex HEAD 208F @ *SELF_LOCKING 10MM SWING_ARM_NUT 50'S_70'S_90'S_110'S 90351-268-000 1/21M (207P) 207P