Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D31944-003 found under Coupler Transmissio by Phoenix Logistics Inc. The National Stock Number assigned to this part is 5985016166576, 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 D31944-003.