Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S1665-20126 found under Adapter Transmitter by W And G Machine Co Inc. The National Stock Number assigned to this part is 1560005735002, and the Federal Supply Class is 1560 Airframe Structural Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like S1665-20126.