Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number TWA613 found under Seat Bearing by Ina Bearing Co Inc. The National Stock Number assigned to this part is 3110008869686, 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 TWA613.