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 covers fasteners used in municipal water infrastructure projects, though recent state and local opportunities show limited direct procurement activity specifically for this narrow product category in isolation. State and local governments do source socket head bolts and related fastener assemblies as components embedded within larger infrastructure construction and equipment acquisition projects—such as butterfly valve installations, pump station modifications, and treatment facility upgrades—rather than as standalone line-item purchases. Issuing bodies soliciting under this code span municipal water utilities and city public works departments, with water treatment and distribution infrastructure projects driving the underlying demand for fasteners like socket head bolts as subcomponents of valve assemblies, structural modifications, and equipment installations.

The City of Lavonia, Georgia, issued an IFB (PE66940NONST2026000000005) on April 24, 2026, for comprehensive Water Treatment Plant 2026 Improvements—a nine-month construction project to upgrade capacity to 3.0 million gallons per day, with a sealed bid deadline of May 26, 2026, that would incorporate fasteners including socket head bolts in modifications to raw water pump stations, settling basins, filtration units, and chemical feed systems. The Eastern Municipal Water District (EMWD) in Riverside County, California, issued an RFQ (RFQWM3930) on March 17, 2026, for Lineseal XP 36" butterfly valves with gasket and bolt nut sets—due March 20, 2026—that would require fasteners as part of the valve assembly specification. Geographic activity concentrates in the Southwest and Southeast, with California and Georgia as recent sources, though the code sees minimal volume as a standalone procurement vehicle; socket head bolts typically enter procurement as embedded specifications within broader equipment or construction contracts rather than as independent commodity acquisitions.