Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number RRA-4455A found under by Black Clawson Co The. The National Stock Number assigned to this part is 5985015115572, and the Federal Supply Class is 5985 Antennas Waveguides And Related Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like RRA-4455A.