Union Coupling


These uninsulated set-screw connectors are used in dry locations to bond EMT thinwall conduits to electrical junction boxes or enclosures. Petra Conduit's uninsulated set-screw connectors provide concrete-tight connections when taped and properly secured with the included locknut. GPetra Conduit's set-screw electrical connectors are rated for electrical applications above 600 volts.

Technical Specification

Cross Section View

Lateral Section View

Size and Dimension

Type D L Weight
G-16 40 33 0.18
G-22 47 35 0.25
G-28 55 40 0.37
G-36 66 47 0.59
G-42 72 49 0.73
G-54 84 55 1.1
G-70 101 63 1.6
G-82 115 68 2.1
G-92 128 70 2.6
G-104 142 76 3.1

Product Feature

High Corrosion Resistance

Pure zinc coating on the exterior wall and stoved epoxy resin finish on the inside protects white conduit from corrosion, even by harsh chemicals and sea air.

Easy and Fast Installation

Precise, sharp threads cut by automated machinery mean fast and easy installation. Precise thread also makes our conduit virtually moisture-tight.

Uniform Quality

Flat steel is rolled, zinc - coated and threaded in one continuous automated process for uniform high quality.