Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 25611-166F found under Resistor Variable W by Marconi Electronics Inc. The National Stock Number assigned to this part is 5905008146333, 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 25611-166F.