Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 503-0140-088 found under Bearing Roller Cylindrical by Rexnord Industries Inc. The National Stock Number assigned to this part is 3110015102720, and the Federal Supply Class is 3110 Bearings Antifriction Unmounted. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 503-0140-088.