Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number JF5R55F found under Resistor Fixed Wire Wound by Ultronix Inc. The National Stock Number assigned to this part is 5905008287599, 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 JF5R55F.