The Department of Defense, through the Defense Logistics Agency (DLA) Aviation at Philadelphia, PA, is soliciting offers for the procurement of stop-check valves, classified under NAICS code 332919. The contract requires the delivery of three units within a timeframe of 459 days, adhering to higher-level contract quality requirements, including ISO 9000 or equivalent standards. These valves are critical components used in various military applications, ensuring operational efficiency and safety. Interested vendors should direct inquiries to Seamus Corkery at 267-530-1679 or via email at SEAMUS.CORKERY@DLA.MIL, and note that proposals must be submitted in accordance with the outlined specifications, as offers from non-government-approved sources will be deemed technically unacceptable.