Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number IR01-8639-126 found under Shaft Shouldered by Ingersoll Rand Corp. The National Stock Number assigned to this part is 3040001464582, 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 IR01-8639-126.