Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number R1000-5B28L found under Flasher Thermal by Teledyne Technologies Inc. The National Stock Number assigned to this part is 5945002568950, 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 R1000-5B28L.