Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 9Y8525 IT 31 found under Hose Assembly Nonme by Caterpillar Inc. The National Stock Number assigned to this part is 4720013537430, and the Federal Supply Class is 4720 Hose And Flexible Tubing. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 9Y8525 IT 31.