This is a total small business set-aside for a parts kit for a size 2 1/2 x 3 inch ball valve, consisting of one ball (Find No. 4) and two mating seats (Find No. 5) per NAVSEA Drawing 801-6405407. The material is designated Special Emphasis for a crucial shipboard system, requiring special control procedures due to safety and mission-critical risk. NAVSUP WSS Mechanicsburg will consider past performance, and the contractor must maintain an ISO-9001 or MIL-I-45208 quality system with calibration controls, material traceability, certifications, and higher-level inspection. Government quality assurance is performed at source, and any new welding procedure qualification requires at least 72 hours’ notification to DCMA with an offer to observe test assembly welding. The award will be a DPAS DO/DX rated order under Emergency Acquisition Flexibilities, issued bilaterally with the contractor’s written acceptance, and supplies carry a one-year warranty from delivery.