Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 661C009 found under Resistor Variable Nonwire Wound Nonprecision by Mcdonnell Douglas. The National Stock Number assigned to this part is 5905009612139, 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 661C009.