The Department of Defense, through the NAVSUP Weapon Systems Support office, is soliciting proposals for the repair of "PUMP UNIT, ROTARY" items, specifically those with National Stock Number 4320013474420 and part number 7591553P3. The procurement requires adherence to the contractor's repair and overhaul standard practices, compliance with MIL-STD-973 for design changes, and the use of mercury-free materials for items intended for submarines and surface ships. This repair service is critical for maintaining operational readiness and safety of naval vessels. Interested contractors must submit their quotations by December 17, 2025, and can direct inquiries to Taylor O'Connor at 215-698-2198 or via email at TAYLOR.M.OCONNOR2.CIV@US.NAVY.MIL.