UNSPSC 31161634: Over neck bolt

A bolt that has an elliptical neck under the head. This bolt has the head with the nominal diameter.

UNSPSC 31161634 Over neck bolt is a Commodity code that captures fasteners and hardware components used in water infrastructure construction and maintenance, based on recent state and local solicitations that tag valve assemblies, pipe fittings, and related appurtenances under this classification. State and local water utilities and municipal public works departments are the primary buyers; the recent opportunity block shows both standalone equipment procurements (valve assemblies with gasket and bolt kits) and integrated fixture purchases as part of larger water treatment facility upgrades. The scope encompasses over-the-neck bolts, gaskets, and fastener sets that complete valve installations and pressure-rated connections in potable-water and wastewater systems, though the code's abstract name understates the integration of these fasteners into larger assemblies and systems that state and local procurement offices bundle together.

The Eastern Municipal Water District in Riverside County, California, and the City of Lavonia, Georgia, represent the geographic and issuing-body mix evident in recent activity. EMWD issued RFQ 3930 on March 17, 2026, for Lineseal XP 36" Butterfly Valves (Class 250B) complete with gaskets and bolt nut sets, with a response deadline of March 20, 2026, and delivery F.O.B. to its Perris operations warehouse. The City of Lavonia (operating under Fayette County jurisdiction) posted Solicitation PE66940NONST2026000000005 on April 24, 2026, for comprehensive Water Treatment Plant 2026 Improvements through sealed competitive bidding, with a May 26, 2026 bid deadline; the project encompasses modifications to multiple treatment units and pump stations funded in part through the Georgia Environmental Finance Authority State Revolving Fund and subject to Build America, Buy America (BABA) Act compliance and 4.0% DBE participation goals. Activity in this code is sparse but concentrated in water utility modernization and capacity-expansion projects in the South and West.