Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number M31-1200 found under Resistor Fixed Wire by Ward Leonard Electric Company Inc. The National Stock Number assigned to this part is 5905006367787, 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 M31-1200.