Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 990-1942 found under Bearing Lower by A L D Inc. The National Stock Number assigned to this part is 3120001053086, 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 990-1942.