Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number RWT500C4 found under Resistor Variable Wire Wound Non by Power Designs Inc. The National Stock Number assigned to this part is 5905007694585, 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 RWT500C4.