Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A31228 found under Roller Set Bearing by Attwood Corp. The National Stock Number assigned to this part is 3110010446444, 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 A31228.