Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1554688 found under Spring Set Rheostat by Westinghouse Electric Corp. The National Stock Number assigned to this part is 5905006900331, 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 1554688.