Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number DSI 140 2057 found under Antenna by Qioptiq Ltd. The National Stock Number assigned to this part is 5985016670990, 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 DSI 140 2057.