Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 5203-111-001 found under Adapter Armature An by Warner Electric Brake And Clutch Co. The National Stock Number assigned to this part is 2520014517045, 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 5203-111-001.