UNSPSC 31161838: Tongued washer

A type of safety washer provided with a hook-shaped projection extending into a hole in the surface which bears the nut.

UNSPSC 31161838 Tongued washer is a Commodity code that captures industrial fastening hardware — specifically lock washers and related sealing or locking washer components — procured by state and local transit authorities, water utilities, and municipalities for infrastructure maintenance and construction projects. Recent solicitations show the code applied to both direct goods procurement (fastener packages for transit fleet maintenance) and as a tagged component within larger water treatment facility construction projects where washers are specified as part of equipment assembly and piping systems.

State and local issuing bodies using this code include transit authorities (Dallas Area Rapid Transit Authority) and municipal water utilities (City of Lavonia, Georgia). Geographic activity in the recent record spans Texas and Georgia, with opportunities posted from January through April 2026. The Dallas Area Rapid Transit Authority issued a straightforward purchase order for Washer Lock 7/16" Medium (Package of 100) with a January 28, 2026 response deadline through the BONFIRE procurement system, requiring FOB Destination shipping with freight included and Net 30 payment terms. The City of Lavonia's Water Treatment Plant 2026 Improvements project (sealed competitive bid, response deadline May 26, 2026) encompasses a nine-month comprehensive facility upgrade including equipment installation and piping modifications where tongued washers and fastening hardware are component-level specifications within the larger construction scope; the project requires a Georgia Utility Contractor license and Davis-Bacon prevailing wage compliance, with 4.0% DBE participation goals and Build America, Buy America material sourcing requirements.