Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number M40-13F found under Resistor Fixed Wire by A Vox Systems Inc. The National Stock Number assigned to this part is 5905011812151, 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 M40-13F.