The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking qualified sources for the procurement of two units of the Inserter, Seal (NSN 1R-5120-015822336-SX, REF NR ST848). This procurement requires engineering source approval due to the flight-critical nature of the item, necessitating that only previously approved sources are solicited, as new source approvals may not be processed in time to meet government needs. The selected supplier must demonstrate unique design capability and provide necessary technical data to ensure the quality of the part, with proposals due to the primary contact, Bridget M. Murphy, at BRIDGET.M.MURPHY6.CIV@US.NAVY.MIL. Interested parties are encouraged to review the NAVSUP WSS Source Approval Information Brochures for submission requirements and to ensure compliance with qualification standards prior to the contract award.