This is a market research notice, not a solicitation, seeking sources to manufacture a specific fluid pressure regulating valve (NSN 4810-01-363-1952). Only two prequalified sources are currently approved, and offers for other manufacturers' parts require extensive technical data and government approval. A first article test is required for any new source. Responses, including a completed Market Research Questionnaire, must be submitted to the Contract Specialist by June 3, 2026. No budget or performance location is specified.