UNSPSC 31161628: Square head bolt

A bolt with square shaped head.

UNSPSC 31161628 Square head bolt is a Commodity code for fasteners used in state and local construction, maintenance, and infrastructure projects. The code covers the procurement of square head bolts — standard threaded fasteners with square heads — as materials components in larger construction and repair work rather than as standalone supply items. State and local governments buy these fasteners as part of capital improvement projects, utility infrastructure upgrades, and facility maintenance across water treatment, transportation, buildings, and general construction. Issuing bodies include municipal utilities, city public works departments, county facilities management, and water authorities that source fasteners as bill-of-materials components for sealed-bid construction contracts.

The most recent state and local opportunity under this code is a sealed competitive bid from the City of Lavonia, Georgia, for the Water Treatment Plant 2026 Improvements project, due May 26, 2026. This IFB encompasses comprehensive modifications to an existing water treatment facility to increase treatment capacity to 3.0 million gallons per day, including modifications to the raw water pump station, installation of a new flash mixer and mixing basin, modifications to settling basins, renovation of four filtration units, upgrades to the chemical feed system, and modifications to clearwell storage tanks. The project spans two sites with a nine-month construction schedule and includes prevailing wage requirements, Davis-Bacon compliance, and Build America, Buy America (BABA) Act material sourcing mandates. A pre-bid conference is scheduled for May 7, 2026, at the water treatment plant in Lavonia, with written questions due by May 12, 2026. The contract specifies a 270-day performance schedule with $500-per-day liquidated damages for delays, and contractors must meet 4.0% DBE participation goals and provide bid, performance, and payment bonds. Recent activity in this code is sparse; the single posted opportunity reflects typical municipal utility infrastructure procurement where square head bolts appear as specification-driven fastener components rather than as the primary procurement focus.