Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 784645-1 found under Duct Assembly Air Conditioning Heating Aircraft by Hamilton Sundstrand Corporation. The National Stock Number assigned to this part is 1560012794001, 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 784645-1.