Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 603742C91 found under Radiator Engine Coolant by Navistar Intl Corp. The National Stock Number assigned to this part is 2930001004061, and the Federal Supply Class is 2930 Engine Cooling System Components Nonaircraft. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 603742C91.