The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support MECH, is seeking to procure 48 units of ball bearings (NSN 3H-3110-009873719-NT) under a presolicitation notice. This procurement requires engineering source approval to ensure the quality of the parts, necessitating that the acquisition or repair be conducted by approved sources with unique design capabilities and manufacturing knowledge. The contract action will be negotiated with only one source under FAR 6.302-1, although all responsible sources are invited to express their interest and capability within 45 days of the notice publication. Interested parties can contact Abigail R. Hurlbut at (717) 605-6805 or via email at ABIGAIL.R.HURLBUT.CIV@US.NAVY.MIL for further information.