UNSPSC 31161720: Stop nuts

UNSPSC 31161720 Stop nuts is a Commodity code that captures fastening hardware components used in construction, infrastructure, and industrial assembly work. State and local governments procure stop nuts as part of larger construction and maintenance projects, typically embedded within broader solicitations for facility upgrades, infrastructure improvements, and equipment installations rather than as standalone fastener orders. The code sees activity across municipalities, counties, and special-purpose districts managing water, wastewater, transportation, and building infrastructure. Stop nuts are specified as components within sealed-bid construction contracts, design-build projects, and equipment procurement solicitations; they rarely appear as line-item purchases in state and local RFQs, reflecting their role as consumable subcomponents within larger project scopes.

The City of Lavonia, Georgia, posted a sealed-bid IFB in April 2026 (Solicitation Number PE66940NONST2026000000005, due May 26, 2026) for Water Treatment Plant 2026 Improvements, a comprehensive facility upgrade including modifications to raw water pump stations, flash mixers, settling basins, filtration units, chemical feed systems, and clearwell storage tanks with a nine-month construction schedule. This project—funded through the Georgia Environmental Finance Authority State Revolving Fund and subject to the Build America, Buy America Act—illustrates the typical procurement environment: stop nuts and similar fasteners are specified within equipment installation and structural assembly line items, with contractors responsible for sourcing compliant materials meeting prevailing wage and domestic-content requirements. The sealed-bid format and 60-day bid hold period are standard for municipal infrastructure projects of this scale. Recent activity remains limited to a single posted opportunity; the code shows sparse state and local procurement velocity overall, suggesting that stop nuts are rarely the primary focus of solicitations and that opportunities are concentrated within construction-phase RFBs and ITBs for water, wastewater, and facility-upgrade projects rather than appearing as independent supply contracts.