The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking to procure 44 units of hydraulic pumps under the presolicitation notice. This procurement requires engineering source approval to ensure the quality of the part, as the approved sources possess unique design capabilities and manufacturing knowledge essential for maintaining the part's integrity. The hydraulic pumps, classified under the PSC code 4320, are critical components for various military applications, and the government intends to negotiate with only one source due to the specialized nature of the requirement. Interested parties should contact Abrianna Saleh at (215) 697-2560 or via email at abrianna.saleh@navy.mil for further details, with proposals due within 45 days of the notice publication.