UNSPSC 31161834: Cup washer

A type of washer designed to protect the head of a metal screw from electrical contact.

UNSPSC 31161834 Cup washer, a Commodity code, encompasses fastening hardware components used across municipal infrastructure and transit operations. State and local governments procure cup washers and related lock washers primarily for maintenance, repair, and capital improvement work on water treatment systems, transportation networks, and facility infrastructure. The issuing bodies soliciting under this code span municipal water utilities, regional transit authorities, and city public works departments, with activity reflecting both routine operational procurements and larger capital project components.

Recent activity shows the Dallas Area Rapid Transit Authority (DART) procuring Washer Lock 7/16" Medium in bulk (package of 100) as of January 2026, with an RFQ deadline of January 28, 2026, reflecting the transit authority's need for standardized fastening components. The City of Lavonia, Georgia, likewise sourced comparable hardware components as part of a broader Water Treatment Plant 2026 Improvements project (sealed competitive bid, due May 26, 2026) that included comprehensive facility upgrades to increase treatment capacity to 3.0 million gallons per day, encompassing modifications to pump stations, mixers, basins, filters, and chemical feed systems where cup washers and lock washers serve critical assembly functions. Geographic activity concentrates in the Southeast (Georgia) and Texas, with DART's Dallas-based procurement suggesting broader Texas transit authority demand. Both solicitations carry standard state and local requirements—FOB Destination shipping with freight included, Net 30 payment terms, prevailing wage compliance where applicable, and DBE participation goals where federal funding is present. No incumbent vendors or set-aside restrictions appear across the recent record.