Compatibility - Shimano Y1P417000. Shimano part no.: Y1P417000. Shimano Ultegra / 105 / Tiagra Crank Arm Fixing Bolt. The Crank Arm Fixing Bolt from Shimano for Ultegra FC-R8000 / FC-6800, 105 FC-R7000 / FC-5800 and Tiagra FC-4700 / FC-4703 crankset with 11 speed double chainsets.
