Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MS1 500S2K found under Resistor Variable W by West Cap Arizona. The National Stock Number assigned to this part is 5905014575023, 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 MS1 500S2K.