UNSPSC 31163302: Weld or clinch stud

Studs designed to be welded or mechanically secured to a metal part.

UNSPSC 31163302 Weld or clinch stud is a Commodity code that state and local governments use to tag procurement of fasteners and welding-related supplies, though recent activity shows the code capturing a broader range of threaded products and equipment than the nominal classification suggests. The Orange County Transportation Authority's March 2026 IFB 250199 exemplifies the actual scope: a three-year fastener supply contract covering hex bolts (SAE and metric), cap screws, lock nuts, flange nuts, washers, threaded rods, socket cap screws, machine screws, rivets, brass fittings, and hose clamps, with North American-made Grade 8 (10.9 metric) high-strength bolts required and laboratory or MilSpec compliance documentation mandated. State and local issuing bodies under this code include county transit authorities, municipal water districts, and county maintenance offices. Procurement spans both commodity fasteners and capital equipment; the North Texas Municipal Water District's July 2026 solicitation, for example, sought two Lincoln Frontier 400X diesel-driven welder/generators for its Welding Department, while Dallas County posted a concurrent request for hex bushings (1/4" × 1/2" black pipe).

Recent activity concentrates in Texas and California. The Orange County Transportation Authority's $150,000 three-year contract—with firm fixed unit pricing, North American-source requirements, and prevailing wage obligations under Davis-Bacon and California Labor Code provisions—represents the most detailed recent opportunity and reflects the compliance and delivery rigor state transportation authorities impose on fastener suppliers. The contract requires monthly scheduled deliveries to two facilities, 48-hour response to urgent requests, and semi-annual inventory reporting with barcode or QR-code labeling. A Disadvantaged Business Enterprise goal applied to the Orange County award. Dallas County and the North Texas Municipal Water District both posted concurrently in mid-to-late 2026, suggesting seasonal procurement cycles tied to maintenance and capital-equipment replacement.