UNSPSC 31163023: Muff coupling

A type of device that has two shafts to face and fit together within a cast iron or cast steel cylinder and is bound with keys. This device is the simplest coupling to use if the axis diameter and the load for conveyance are very small.

UNSPSC 31163023 Muff coupling is a Commodity code that designates mechanical coupling components used to connect shafts in rotating equipment, though recent state and local procurement activity under this code shows minimal relevant solicitation volume. The code appears applied inconsistently in state and local notices, with recent opportunities tagged to this Commodity showing scope misalignment — the single recent opportunity on record is DeKalb County's reconstruction project for the DeKalb Tennis Center, which focuses on IT and low-voltage infrastructure installation rather than mechanical coupling procurement or equipment requiring shaft connections.

The geographic activity remains limited to Georgia, based on the single recent opportunity. DeKalb County, Georgia posted an ITB (2026-076-ITB) on June 9, 2026 for reconstruction of the DeKalb Tennis Center in Mason Mill Park, Decatur, due July 13, 2026, but the scope emphasizes conduit, cabling, raceways, and low-voltage systems rather than mechanical couplings. Business development professionals should verify whether opportunities tagged to 31163023 reflect actual muff coupling demand or represent coding classification drift. The code warrants monitoring, but current posted activity does not substantiate substantive state and local procurement volume in this Commodity category.