Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number C4W1684-1 found under Boot Draft Extruder by Bombardier Aerospace. The National Stock Number assigned to this part is 1560005222231, 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 C4W1684-1.