The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking proposals for the procurement of 23 units of a flight-critical interface unit, identified by NSN 7R-7025-016241529-KB. The procurement is subject to strict source approval requirements, as the item must be acquired from approved sources due to the lack of available technical data for alternative suppliers. Interested vendors must submit their proposals along with necessary documentation for source approval within 45 days of this presolicitation notice, with the primary contact for inquiries being Chad M. Fichter at (215) 697-2782 or via email at CHAD.FICHTER@NAVY.MIL.