Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MS1-500B500 found under Resistor Variable W by Sfe Technologies. The National Stock Number assigned to this part is 5905009849866, 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 MS1-500B500.