The Defense Logistics Agency is conducting market research via a sources sought notice, not a solicitation, for the new manufacture of a FILLER VALVE, AIRCRAFT, under NAICS 336411. The notice references NSN 5895-014743750 and a specific requirement for MIL-PRF-25961H filler valve, NSN 1660-010925376, estimated at 1,434 EA. There are two approved sources: Essex Industries Inc. (Cage 83533) and Mission Systems Orchard Park Inc. (Cage 04577). Interested parties should provide organizational information and tailored capability statements, including any subcontracting or teaming structure; drawings, technical orders, and qualification requirements are not available. Based on responses, the requirement may be set aside for small businesses or procured through full and open competition, and multiple awards may be made.