Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number UB1-R634F-90PPM found under Resistor Fixed Wire Wound Induct by Imperial Astronics. The National Stock Number assigned to this part is 5905013701131, 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 UB1-R634F-90PPM.