UNSPSC 31161731: Weld nuts

Weld nuts have a projection for spot welding. It is classified by function.

UNSPSC 31161731 Weld nuts is a Commodity code describing fastening hardware procured by state and local governments primarily for transit maintenance, water district operations, and industrial maintenance applications. Recent solicitations show state and local buyers acquiring nuts in bulk packages—elastic stop nuts, Grade 8 hex nuts, M8 stainless steel fasteners with suspension springs—as consumable repair and maintenance stock rather than as components within larger construction or fabrication projects. The Dallas Area Rapid Transit Authority appears as a repeat buyer across multiple recent opportunities, sourcing nuts and related fasteners (washers, bolts) in standardized packages of 25 to 100 units with strict delivery and FOB Destination requirements. Water and utility districts also buy under this code; the North Texas Municipal Water District recently solicited bids for Lincoln Frontier welder/generator equipment, though that opportunity represents an outlier in the commodity's recent activity mix and does not reflect the typical scope of nuts procurement.

The code shows recent activity concentrated in Texas, particularly through Dallas Area Rapid Transit Authority's January 2026 procurement cycle, which posted five separate nut and fastener solicitations (responses due January 28 through February 5, 2026) via the BONFIRE registration system. Riverside County, California issued an RFB for Cla-Val parts inventory on January 21, 2026 (due February 13, 2026), expanding the geographic footprint. Representative opportunities include DART's solicitation for 1/4-28 zinc-plated elastic stop nuts in packages of 100 units (item 2097736, due February 5, 2026) and Grade 8 9/16"-18 nuts in boxes of 25 (item 2097554, due January 28, 2026), both requiring FOB Destination pricing, triplicate invoicing to APInvoices@dart.org, and Net 30 payment terms with strict delivery scheduling enforced through default termination clauses. Activity in this code is moderate and episodic rather than continuous; procurement cycles reflect routine consumable replenishment by transit and utility operations.