UNSPSC 31391604: Stainless steel medium precision machining

Stainless steel objects that have been machined to tolerances equal to or greater than 0.020 mm for major dimensions

UNSPSC 31391604 Stainless steel medium precision machining (Commodity) covers manufactured metal components and assemblies produced to medium precision tolerances, though recent state and local procurement activity under this code centers on fire hydrants—cast or ductile iron pressure vessels that do not align with the code's nominal stainless steel machining scope. The mismatch between code designation and actual procurement suggests either a cataloging error or that the code is being applied to fire hydrant sourcing despite material and precision differences from its stated definition. State and local governments buying under this code are city and county water and utility departments; the City of Midland, Texas, acting on behalf of Mason County, represents the primary recent issuing body on record.

The City of Midland issued Solicitation 26003721 on March 26, 2026, for 71 fire hydrants (45 units of 4-foot, 20 units of 5-foot, and 6 units of 6-foot) under the U25-01 Fire Hydrant Replacement Project, with bids due April 9, 2026, through the Bonfire e-procurement system. The procurement applied Texas local preference provisions allowing award to a local bidder within five percent of the lowest non-local bid, required workers' compensation insurance with the City named as additional insured, and reserved the right to award by item or by total bid to the lowest responsible bidder or best-value proposer under Texas Local Government Code Section 252.043. Geographic activity is limited to Texas in recent records. The source does not identify an incumbent vendor, award value, or budget range.