Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number ST 1224 1 found under Bearing Washer Thrust by Symmco Inc. The National Stock Number assigned to this part is 3120016680667, and the Federal Supply Class is 3120 Bearings Plain Unmounted. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like ST 1224 1.