Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number W1F9BBS 9801 found under Collar Oil Cooler by Imo Industries Inc. The National Stock Number assigned to this part is 2825012028563, and the Federal Supply Class is 2825 Steam Turbines And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like W1F9BBS 9801.