Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number XXBNN665320 found under Checking Tool by Coltec Industries Inc. The National Stock Number assigned to this part is 2815015642931, and the Federal Supply Class is 2815 Diesel Engines And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like XXBNN665320.