Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MPS 4122 found under Shaft Input by Axletech International Inc. The National Stock Number assigned to this part is 2520000807486, 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 MPS 4122.