This is a 5-year, indefinite quantity contract for a specific bulkhead and tube assembly, with an estimated annual quantity of 120 units. The performance location is not specified. The government intends to solicit a limited number of sources, and this notice is not a formal request for proposals, though responses within 45 days may influence a decision on whether to compete the procurement. The estimated solicitation issue date is March 12, 2026, which is when technical data will become available. Contractors must be registered in SAM.gov to be eligible for award.