The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking to procure five units of the Regulator, Fuel Pressure (NSN 7R-1660-008905328-LU). This procurement requires engineering source approval due to the flight-critical nature of the item, necessitating that only approved sources may submit proposals, as the technical data available does not support full and open competition. The selected supplier must demonstrate unique design capabilities and provide necessary documentation for source approval, with proposals due within 45 days of the notice publication. Interested parties should contact Shannon K. Fitzgerald at (215) 697-3638 or via email at SHANNON.K.FITZGERALD3.CIV@US.NAVY.MIL for further details.