This is a market research notice to identify potential manufacturers for a specific safety relief valve (NSN 4820-004078372) and is not a formal solicitation. Interested parties must submit a completed Market Research Questionnaire to the designated Contract Specialist by March 20, 2026. The notice lists the currently approved sources and associated part numbers for the valve. An alternate offeror must provide a complete data package for both the approved and alternate parts for evaluation. No budget or performance location is specified.