Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 551 1217 40 found under Resistor Fixed Wire by L 3 Communications Corporation. The National Stock Number assigned to this part is 5905014350733, 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 551 1217 40.