THOMAS & BETTS 604-TB REDUCING BUSHING #287023

Description:

The Thomas & Betts 604-TB Reducing Bushing is used to reduce a 1-1/4-inch female threaded conduit opening to accommodate a 1/2-inch threaded rigid metal conduit (RMC) or intermediate metal conduit (IMC). Commonly installed in conduit bodies, junction boxes, outlet boxes, and electrical enclosures used in commercial, industrial, and utility electrical systems, this threaded steel reducer provides a secure transition between different conduit sizes while protecting conduit ends with its built-in bushing. Electricians, maintenance technicians, and system integrators use this fitting for new installations, repairs, retrofits, and replacement of threaded conduit reducers.

Applications:

The Thomas & Betts 604-TB is designed to connect different conduit trade sizes by reducing threaded openings in conduit bodies and female threaded fittings. It is widely used in power distribution systems, industrial automation, commercial buildings, manufacturing facilities, and utility installations where rigid steel conduit or IMC systems require reliable threaded size transitions while maintaining code-compliant conduit connections.

Technical Specifications:

• Manufacturer Part Number (MPN): 604-TB
• Alternate Reference: #287023
• Brand: Thomas & Betts (ABB)
• Product Type: Threaded Reducing Bushing
• Large Trade Size: 1-1/4 in.
• Small Trade Size: 1/2 in.
• Conduit Type: Rigid Metal Conduit (RMC) / Intermediate Metal Conduit (IMC)
• Material: Steel
• Finish: Zinc-Plated
• Thread Type: NPT Male x Female
• Connection Type: Threaded
• Function: Reduces Threaded Conduit Openings Between Different Trade Sizes
• Special Feature: Smooth Built-In Bushing Covers Rough Conduit Ends
• Application: Conduit Bodies, Junction Boxes, Electrical Enclosures, Female Threaded Fittings
• Standards: UL E23018, CSA Certified
• UPC: 786210006048
• Typical Industries: Commercial Construction, Industrial Facilities, Utilities, Manufacturing, Electrical Distribution Systems

Common Replacements:

• Thomas & Betts 603-TB
• Thomas & Betts 605-TB
• Thomas & Betts 606-TB