Thomas & Betts 677AL Threaded Conduit Coupling

Description:

The Thomas & Betts 677AL Threaded Conduit Coupling is used to connect and bond 1-inch threaded rigid metal conduit (RMC) and intermediate metal conduit (IMC) where neither conduit can be rotated during installation. Commonly installed in industrial facilities, commercial buildings, power distribution systems, manufacturing plants, and utility installations, this aluminum three-piece coupling provides a secure, rigid, and vibration-resistant conduit connection. Maintenance teams and electrical contractors use this fitting for repair, retrofit, expansion, and replacement of threaded conduit systems.

Applications:

The Thomas & Betts 677AL is designed for joining 1-inch threaded rigid metal conduit and IMC in locations where rotating either conduit is impractical. Its ERICKSON® three-piece design allows conduit runs to be assembled or disassembled without disturbing the entire raceway. The copper-free aluminum construction offers excellent corrosion resistance while maintaining dependable electrical bonding, making it suitable for commercial, industrial, utility, and outdoor electrical installations. The coupling is concrete-tight and designed to resist vibration while maintaining conduit alignment.

Technical Specifications:

• Manufacturer Part Number (MPN): 677AL
• Brand: Thomas & Betts (ABB) – ERICKSON®
• Product Type: Threaded Conduit Coupling
• Trade Size: 1 in.
• Conduit Type: Rigid Metal Conduit (RMC) and Intermediate Metal Conduit (IMC)
• Coupling Style: Three-Piece ERICKSON® Coupling
• Material: Copper-Free Aluminum
• Finish: Natural Aluminum
• Thread Type: NPS Threaded
• Installation: Threaded
• Construction: Concrete-Tight
• Overall Length: 1-5/8 in.
• Outside Diameter: 1-29/32 in.
• Application: Joining threaded conduit where neither conduit can be rotated
• Standards: UL 514B, UL File E23018, CSA Certified, NEMA FB1, ANSI C80.4
• Compliance: RoHS 3 Compliant, REACH Compliant, TSCA Section 6(h) Compliant
• Features: Three-piece design, corrosion-resistant aluminum construction, free-fitting threads for easy assembly, vibration-resistant connection, rigid in-line coupling, and dependable grounding continuity.

Common Replacements:

• Thomas & Betts 676AL
• Thomas & Betts 678AL
• Thomas & Betts 677