Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2003-397 found under Heater Coolant Engine by Crane Company. The National Stock Number assigned to this part is 2990014989108, and the Federal Supply Class is 2990 Miscellaneous Engine Accessories Nonaircraft. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 2003-397.