Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number DN3138 found under Bearing Gear by Usm Corp. The National Stock Number assigned to this part is 3110008918655, 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 DN3138.