UNSPSC 31163300: Studs

A type of fastener, often attached to a larger part, with threads at one or both ends used to join multiple parts.

UNSPSC 31163300 Studs is a Class code that captures fasteners and threaded hardware products that state and local governments procure for fleet maintenance, infrastructure repair, and operational supply. Recent solicitations under this code show demand for hex bolts (SAE and metric), cap screws, lock nuts, flange nuts, washers, threaded rods, socket cap screws, machine screws, rivets, and related fastening supplies. Issuing bodies include transit authorities and other special-purpose districts. The Orange County Transportation Authority (OCTA) represents the principal recent buyer activity, soliciting fasteners as part of its fleet and facility maintenance operations.

OCTA's IFB 250199 for threaded products and fasteners, due March 16, 2026, illustrates the scope at work: the Authority sought an estimated $150,000 three-year contract covering 154 line items of fastening supplies with monthly scheduled deliveries and 48-hour response times for urgent orders. All fasteners were required to be North American-made Grade 8 (10.9 metric) high-strength bolts with ISO 17025 or MilSpec certification, and delivery was specified to two facilities in the Orange County area (Garden Grove and Santa Ana, California). The contract included Davis-Bacon prevailing wage requirements and a Disadvantaged Business Enterprise goal. The code shows limited recent activity beyond this single representative opportunity, and one competing solicitation posted under the code (DART's rubbing alcohol bid) falls outside the fasteners and studs scope, suggesting the code may see sparse procurement volume or misclassification in some state and local systems.