Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 990-1515 found under Bearing Washer Thrust by A L D Inc. The National Stock Number assigned to this part is 3120008440742, and the Federal Supply Class is 3120 Bearings Plain Unmounted. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 990-1515.