This is a non-competitive, sole-source procurement for 4 units of a specific part (NSN 1H-5998-015675969-X3). The government cannot obtain the necessary data to use other sources, and reverse engineering is uneconomical. Delivery locations are New Cumberland, PA, and Tracy, CA. Interested parties must submit capability statements or proposals within 45 days (or 30 days under an existing BOA) of the synopsis publication. A commercial item alternative may be identified within 15 days.