Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4879AU found under Shaft Power Take Of by Twin Disc Incorporated. The National Stock Number assigned to this part is 2520002391031, 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 4879AU.