Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 272421 found under Bearing Roller Cylindrical by United Technologies Corporation. The National Stock Number assigned to this part is 3110008649379, 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 272421.