Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 17P1C2219-521 found under Bearing Sleeve by Boeing Aircraft. The National Stock Number assigned to this part is 3120014392145, 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 17P1C2219-521.