UNSPSC 31161830: Wave washer

A type of washer designed to offer a compensating spring force and maintain a load or take up shock.

UNSPSC 31161830 Wave washer is a Commodity code that encompasses small fastener components and related hardware used in mechanical assembly and maintenance across state and local infrastructure and operations. The recent solicitation activity under this code shows state and local governments purchasing discrete fastening components—bolts, washers, and allied hardware—as parts of routine procurement and capital improvement projects. Issuing bodies include transit authorities and municipal utilities, which acquire these items both as standalone consumables through purchase orders and as components embedded in larger construction and facility-upgrade projects. The code appears to serve multiple procurement pathways: direct PO-based buying for replacement parts and maintenance stock, and indirect procurement through construction and infrastructure contracts where fasteners are specified as part of broader scopes of work.

Dallas Area Rapid Transit Authority (DART) posted an IFB (Purchase Order 2100828) on September 3, 2026, seeking bolts (1/2"-13 X 2-3/4") with a response deadline of September 11, 2026, under FOB Destination terms with Net 30 payment and delivery timing as an essential contract element. The City of Lavonia, Georgia issued a sealed-bid RFQ in April 2026 for water treatment plant improvements that included comprehensive facility upgrades with component specifications; the project's nine-month construction window and multi-site scope (main plant and remote pump station) reflect how wave washers and fastening hardware integrate into municipal capital projects. Recent activity concentrates in Texas (DART) and Georgia (Lavonia), with procurement notice types ranging from discrete purchase orders to sealed-bid construction RFQs. The code shows limited but concrete recent activity; opportunities emphasize FOB terms, payment schedules, and delivery compliance as critical contract variables.