This opportunity is for the competitive acquisition of NSN 5340-016635150, a part currently supplied only by three approved sources: Durex International, Leidos Inc, and FlightFab, Inc. The part requires engineering source approval due to unique design and manufacturing knowledge held by these sources, making reverse engineering economically unfeasible for the government. Prospective alternate sources must qualify through the DLA Land and Maritime Alternate Offer/Source Approval Request (SAR) program, demonstrating their product meets or exceeds original manufacturer quality. Interested companies may submit source information or a SAR application package to the contract specialist for review. No budget, performance location, or non-submission timelines were specified.