Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 745-1863-420 found under Resistor Fixed Composition by Rockwell Collins Inc. The National Stock Number assigned to this part is 5905001970224, 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 745-1863-420.