Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AS4-1000-137 found under by Precision Swageinc. The National Stock Number assigned to this part is 3040011589686, and the Federal Supply Class is 3040 Miscellaneous Power Transmission Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like AS4-1000-137.