UNSPSC 31161637: Socket head bolt

A bolt that has a cylindrical head with the hexagon groove on the back of the head.

UNSPSC 31161637 Socket head bolt is a Commodity code that captures individual fastener components used across state and local infrastructure, construction, and maintenance projects. The recent opportunity record shows socket head bolts being procured as part of broader equipment and structural assemblies rather than as standalone line-item purchases — in this case, as components embedded in water treatment plant equipment, pump station assemblies, and filtration systems. State and local governments buy socket head bolts primarily through construction and capital improvement contracts where fastening hardware is specified as part of equipment procurement or facility renovation work, rather than through dedicated fastener-only solicitations. Issuing bodies include municipal utilities, city public works departments, and county-level infrastructure authorities managing water systems, wastewater treatment, pumping stations, and related facility upgrades.

The single recent opportunity is the City of Lavonia, Georgia Water Treatment Plant 2026 Improvements project, issued as a sealed competitive bid (IFB) with a due date of May 26, 2026. The project encompasses comprehensive facility modifications including pump station equipment, filtration units, mixing basins, and storage tank upgrades, all of which require fastening hardware including socket head bolts as component parts. The work is funded in part through the Georgia Environmental Finance Authority State Revolving Fund and is subject to the Build America, Buy America Act, requiring domestic production of materials unless an approved waiver is obtained. The procurement includes DBE participation goals requiring 4.0% participation from minority-owned and women-owned businesses, a pre-bid conference on May 7, 2026, and a contract schedule of 270 calendar days. The source provides limited evidence of recent socket head bolt activity beyond this single water treatment infrastructure project in Georgia; broader state and local procurement patterns for this Commodity code are not represented in the current opportunities block.