UNSPSC 31161825: Belleville washer

A type of non-flat washer with aslight conical shape which gives the washer a spring characteristic.

UNSPSC 31161825 Belleville washer is a Commodity code that captures the procurement of specialized fastening and sealing hardware — specifically split-ring lock washers and related spring washers used in industrial, transit, water infrastructure, and mechanical assembly applications. State and local buying under this code centers on small-quantity component orders embedded in larger equipment maintenance, facility upgrades, and construction projects rather than standalone hardware procurement. Transit authorities, municipal utilities, and public works departments treat Belleville washers as consumable stocking items or project-specific line items within repair and replacement orders, typically acquired through competitive bid processes or standing purchase orders with local or regional distributors.

Recent procurement activity shows limited direct Belleville-washer solicitations; the Dallas Area Rapid Transit Authority (DART) posted a purchase order (PE 2100828) for bolts on September 3, 2026, with a September 11, 2026 response date, suggesting fastener components are bundled into transit maintenance contracting. The City of Lavonia, Georgia posted a sealed competitive bid for Water Treatment Plant 2026 Improvements (PE66940NONST2026000000005) due May 26, 2026, which likely incorporated specialty washers as specification line items within the broader infrastructure upgrade; this project included Davis-Bacon prevailing-wage requirements and DBE participation goals. Geographic activity centers on Georgia and Texas based on recent postings, though the code shows minimal recent state and local opportunity volume — Belleville washers typically appear as subsidiary items within RFPs or IFBs for equipment, maintenance, or construction rather than as standalone procurement targets. Vendors pursuing this code should focus on established relationships with transit authorities, municipal utilities, and public works departments that maintain standing purchase agreements for component-level fasteners.