Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number R19-43 found under Relay X Ray Generat by Marconi Medical Systems Inc. The National Stock Number assigned to this part is 5945014215422, 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 R19-43.