Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 97A50W21A found under Coupler Directional by Wiltron Co. The National Stock Number assigned to this part is 5985011219671, 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 97A50W21A.