Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 9S8001 AND 4J7533 found under Plug Machine Thread by Caterpillar Inc. The National Stock Number assigned to this part is 5365001944472, and the Federal Supply Class is 5365 Bushings Rings Shims And Spacers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 9S8001 AND 4J7533.