Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 9Y8490 found under Hanger Pipe by Caterpillar Inc. The National Stock Number assigned to this part is 5340015701967, and the Federal Supply Class is 5340 Hardware Commercial. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 9Y8490.