Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 50121207 ITEM NO. 20 found under Relay Electromagnetic by Crane Midwest. The National Stock Number assigned to this part is 5945014310425, and the Federal Supply Class is 5945 Relays And Solenoids. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 50121207 ITEM NO. 20.