Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number RM20-28V20 found under Relay Thermal by Spx Corp. The National Stock Number assigned to this part is 5945005016119, 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 RM20-28V20.