UNSPSC 31161635: Washer assembled bolt

A machine bolt that has is assembled with the washer that cannot be separated for one or more thereof.

UNSPSC 31161635 Washer assembled bolt, a Commodity code, covers fastener hardware — specifically assembled washers with bolts — procured by state and local water utilities and municipal infrastructure operators for water treatment facility construction, upgrades, and maintenance. State and local governments buy these fasteners as components within larger water system projects, where they secure connections in pump stations, valve assemblies, piping systems, and treatment equipment. The issuing bodies soliciting under this code include municipal water districts and city water utilities managing water treatment and distribution infrastructure.

Recent activity shows Eastern Municipal Water District (EMWD) in Riverside County, California issuing RFQ 3930 on March 17, 2026, for Lineseal XP 36" Butterfly Valves (Class 250B) with gaskets and bolt nut sets, due March 20, 2026 — a direct specification of fastener hardware for water system components. The City of Lavonia, Georgia posted a sealed competitive bid on April 24, 2026 (due May 26, 2026) for comprehensive water treatment plant improvements including raw water pump station modifications, filtration unit renovations, and chemical feed system upgrades, work that incorporates assembled washers and bolts throughout the facility's structural and mechanical systems. Geographic activity concentrates in California and Georgia, with water utility procurement driving demand in regions managing large-scale treatment infrastructure upgrades.