UNSPSC 31161722: Union nuts

UNSPSC 31161722 Union nuts (Commodity) covers the supply of fastening hardware, including elastic stop nuts, hex nuts in various grades and sizes, and related fastening components that state and local governments procure for maintenance and operations of transit systems, water treatment facilities, and municipal infrastructure. Recent solicitations show union nuts being purchased as routine consumable inventory items for mechanical systems and equipment repair, supplied in small package quantities (boxes of 25 to 100 units) with standard commercial warranties and FOB Destination terms.

The code sees activity primarily from regional transit authorities and county water utilities. The Dallas Area Rapid Transit Authority (DART) in Dallas County, Texas represents a significant repeat buyer, having posted four fastener solicitations in January 2026 alone, including elastic stop nuts (1/4-28 zinc, due February 5, 2026), Grade 8 nuts (9/16"-18, due January 28, 2026), M8 ESNA hex fasteners (due January 28, 2026), and related suspension springs (due January 28, 2026). Beyond transit, the code appears in water infrastructure work—the City of Lavonia, Georgia posted a Water Treatment Plant 2026 Improvements sealed bid (due May 26, 2026) that encompasses comprehensive facility upgrades requiring fastening components as appurtenances to the broader construction scope. Riverside County, California solicited Cla-Val parts for warehouse inventory through an RFB posted January 21, 2026 (due February 13, 2026), reflecting ongoing municipal consumable purchasing. The code shows recent activity concentrated in Texas and Georgia, with secondary activity in California. DART's procurement pattern suggests recurring quarterly or monthly purchasing cycles for fastener inventory replenishment, with tight one-week to two-week response windows and Net 30 payment terms.