This is a sole source procurement for an aircraft seat valve from Northrop Grumman Systems Corporation, the original equipment manufacturer and only known source. The government does not own the data or rights needed to purchase from other suppliers, and no drawings are available. Delivery will be to DLA Distribution centers in New Cumberland, PA and Tracy, CA. Any non-approved firm must submit a Source Approval Request, but the procurement will not be delayed for approval. The contract duration is one year, and interested parties may submit capabilities, though this is not a competitive request.