UNSPSC 31161738: Keps nut or K nut

Also called a K-nut or washer nut. It is a nut with an attached, free-spinning washer used to make assembly more convenient

UNSPSC 31161738 Keps nut or K nut is a Commodity code that encompasses fastening hardware used across infrastructure and construction applications. State and local governments procure these specialized nuts—self-locking or keyed variants designed to prevent vibration-induced loosening—primarily as components within larger construction, maintenance, and facility improvement projects rather than as standalone inventory items. The issuing bodies reflect the distributed nature of infrastructure procurement: municipal water authorities, city public works departments, and county maintenance operations are the primary buyers, with activity driven by capital improvement cycles at water treatment facilities, wastewater systems, road and bridge maintenance, and building renovation projects.

Recent opportunities show concentration in municipal water infrastructure. The City of Lavonia, Georgia (operating under Fayette County jurisdiction) posted a sealed competitive bid on April 24, 2026, due May 26, 2026, for Water Treatment Plant 2026 Improvements (Solicitation PE66940NONST2026000000005), a comprehensive nine-month facility upgrade project including raw water pump station modifications, new mixing basins, settling basin renovations, filtration unit overhauls, chemical feed system upgrades, and clearwell storage tank modifications to increase capacity to 3.0 million gallons per day. The project requires a Georgia Utility Contractor license, prevailing wage compliance, Davis-Bacon Act adherence, and a 4.0% disadvantaged business enterprise participation goal. Contract documents are available from PeoplesQuigley | DCCM for $250 per set. This single recent opportunity suggests that keps nuts appear as specification-driven components in municipal utility capital projects rather than as frequently solicited standalone procurements, making this code a lower-velocity category for vendors not already engaged in water treatment and utility construction supply chains.