Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SM-C-604038 found under Resistor Variable Wire Wound Non by Projects Unlimited Inc. The National Stock Number assigned to this part is 5905004996955, 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 SM-C-604038.