Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4007443 found under Clutch Shaft Assemb by Funk Mfg Co. The National Stock Number assigned to this part is 2520012686074, and the Federal Supply Class is 2520 Vehicular Power Transmission Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 4007443.