Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 491 10081-503 found under Bearing Plain Spherical by Boeing Aircraft. The National Stock Number assigned to this part is 3120013026567, 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 491 10081-503.