Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 72-999020 found under Relay Hybrid by Communications And Power Industries. The National Stock Number assigned to this part is 5945011904956, 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 72-999020.