UNSPSC 31161709: Clamping nuts

UNSPSC 31161709 Clamping nuts is a Commodity code covering fastening hardware — specifically elastic stop nuts, hex nuts, and Grade 8 fastening hardware in various sizes — that state and local governments procure for transit operations, water treatment facility upgrades, and routine maintenance inventory. The code shows activity across transit authorities and municipal utilities, with Dallas Area Rapid Transit Authority (DART) appearing as a repeat buyer of small consumable quantities of specialty fasteners for fleet and operations maintenance. The City of Lavonia, Georgia, and Riverside County, California, round out the issuing-body mix as occasional procurers of fasteners embedded within larger infrastructure or inventory projects.

Recent activity is concentrated in Texas and spans January through May 2026. DART posted four separate fastener solicitations in January 2026 — elastic stop nuts 1/4-28 zinc-plated (due February 5, 2026), M8 hex stainless steel suspension springs (due January 28, 2026), and Grade 8 nuts 9/16"-18 (due January 28, 2026) — all with response windows of one week and FOB Destination shipping terms required. The City of Lavonia issued a sealed competitive bid (IFB) on April 24, 2026, for Water Treatment Plant 2026 Improvements (due May 26, 2026, with pre-bid May 7, 2026) that encompasses clamping and fastening hardware within a broader $3.0 million gallons per day capacity upgrade project subject to Davis-Bacon prevailing wage and Build America, Buy America compliance, plus 4.0% DBE participation goals. Riverside County posted a Request for Bid on January 21, 2026, for miscellaneous Cla-Val parts warehouse inventory (due February 13, 2026) that likely includes fastening components. DART's standard terms require Net 30 payment, triplicate invoicing to APInvoices@dart.org, commercial warranties, and equal opportunity compliance; municipal infrastructure projects impose prevailing wage and federal Buy America requirements.