Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1137 SUPERIOR found under Sewing Machine Needle Clamp by B And G Lieberman Co Inc. The National Stock Number assigned to this part is 3530015640980, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 1137 SUPERIOR.