Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number R20 1 502J found under Resistor Variable Wire Wound Precision by Raytheon Technical Services Company. The National Stock Number assigned to this part is 5905006664179, 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 R20 1 502J.