Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1721 2001 1 250W found under Resistor Fixed Wire by Precision Electronic Coil Mfg Co. The National Stock Number assigned to this part is 5905014813132, 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 1721 2001 1 250W.