Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number CR1-4-1801J found under Resistor Fixed Composition by Airco Industries Inc. The National Stock Number assigned to this part is 5905001145343, and the Federal Supply Class is 5905 Resistors. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like CR1-4-1801J.