STEM ASSEMBLY
Overview
Buyer
Place of Performance
NAICS
PSC
Set Aside
Original Source
Timeline
Qualification Details
Fit reasons
- NAICS alignment with historical contract wins in similar service areas.
- Scope strongly matches core technical capabilities and delivery model.
Risks
- Past performance thresholds may require one additional teaming partner.
- Potential clarification needed on staffing minimums before bid/no-bid.
Next steps
Validate eligibility requirements, assign capture owner, and schedule partner outreach to confirm teaming strategy before submission planning.
Quick Summary
The Department of the Navy (NAVSUP WSS Mechanicsburg) is soliciting proposals for the provision of a Complete Stem Assembly for an 8-inch Ball Valve. This is a Solicitation for Special Emphasis Material designated for crucial shipboard systems. The opportunity is a Total Small Business Set-Aside. Proposals are due by May 4, 2026.
Scope of Work
This requirement is for a complete Stem Assembly, including Stem (Piece 23), Stem Retaining Nut (Piece 24 with Plug Piece 11), and Bushing (Piece 25), in accordance with Naval Ship Systems Command Drawings 803-4385058, DRN 4385058-C4, 803-4384678, and DRN 4384678-C6. Key material specifications include ASTM-B505 for the Stem Retaining Nut and QQ-N-286 for the Stem, requiring specific annealing, age hardening, and no weld repair. The material is designated as Special Emphasis Material due to its critical application in shipboard systems, necessitating stringent control procedures. All materials must be mercury-free.
Contract & Timeline
- Type: Solicitation
- Set-Aside: Total Small Business
- Product Service Code: 4820 (Valves, Nonpowered)
- Response Due: May 4, 2026, 8:30 PM UTC
- Published: March 23, 2026
- Evaluation: Past performance will be considered in accordance with FAR 13.106(a)(2) and DFARS 252.213-7000. This is a DX rated order for national defense use under the Defense Priorities and Allocations System (DPAS).
Quality & Compliance
Contractors must maintain a quality system in accordance with ISO-9001 (with ISO-10012 or ANSI-Z540.3 with ISO-17025) or MIL-I-45208 (with MIL-STD-45662). Extensive testing and certification requirements apply, including quantitative chemical/mechanical analysis, ultrasonic inspection, and dye penetrant inspection. Traceability for Level I/SUBSAFE systems is mandatory, requiring unique markings and material certification reports. Certification data must be submitted to Portsmouth Naval Shipyard via Wide Area Work Flow (WAWF) for review and acceptance prior to shipment.
Submission Requirements
Access to drawings must be requested on the SAM.gov solicitation page, followed by an email to the Primary POC. Detailed procedures for waivers, deviations, and Engineering Change Proposals (ECPs) are outlined, requiring review and approval by the Contracting Officer.
Additional Notes
The solicitation date will be shortened once drawings are posted on SAM.gov. DD1423 Data Item A001 may be waived if already on file at NAVSUP WSS Mechanicsburg.