Southwire Components 3 in. Steel Set Screw EMT/Rigid Conduit Connector
The Southwire Components 638S is a 3-inch set screw type connector for connecting EMT or rigid metal conduit to electrical enclosures and junction boxes. Fabricated from steel with a zinc plating finish, it provides a secure, code-compliant mechanical and electrical connection.
Product Specifications
- Trade size: 3 inches
- Material: Steel
- Finish: Zinc plated
- Connection type: Set screw
- Product type: Set Screw EMT Connector
- Application: For rigid and EMT conduit
- Standards: UL 514B, UL File Number E148716, US Federal Spec A-A-50553, CSA Certified, NEMA/ANSI FB-1, Military Spec W-F-406D, W-F-406E, W-F-408D, W-S-610D
- Manufacturer: Southwire Components
- Model: 638S
Features
- Set screw design provides reliable conduit retention without special tools
- Zinc-plated steel construction for corrosion protection
- Listed to UL 514B for conduit fittings
- CSA certified for Canadian installations
- Meets NEMA/ANSI FB-1 and multiple military specifications
- Compatible with both EMT and rigid metal conduit
Applications
This connector is used in commercial, industrial, and institutional electrical installations to terminate 3-inch EMT or rigid conduit at panel knockouts, junction boxes, and other enclosures. The set screw design is a standard choice for interior installations where conduit needs to be secured without a threaded hub.



