Thomas Betts 54187 Square Ring Terminal 5/8 Inch Stud

Product Description

The THOMAS BETTS 54187 is a non-insulated square ring terminal designed for compression-style electrical connections in high-demand wiring applications. Constructed with a copper contact body and a titanium nitride (TiN) plating, it offers reliable conductivity and corrosion resistance at the termination point. The terminal measures 3.63 inches in overall length and 1.61 inches in ring width, with a barrel thickness of 0.22 inches. It accommodates a 5/8 inch stud and is finished in brown for identification. Electricians and electrical contractors install this terminal type when making permanent, tool-crimped lug connections in panel, switchgear, or heavy conductor termination work.

This square ring terminal is suited for commercial and industrial electrical installations where non-insulated, bare lug terminations are required. It is typically used with large-gauge conductors that require a secure, compression-crimped connection to a 5/8 inch stud. The square ring profile seats flat against bus bars, terminal blocks, and equipment studs, making it common in panel assemblies, motor control centers, and similar fixed electrical infrastructure.

Key Features

• Compression connection type for tool-crimped, permanent terminations
• Copper contact material for strong electrical conductivity
• Titanium nitride (TiN) contact plating for corrosion resistance
• 5/8 inch stud size accommodates standard heavy-duty fasteners
• Non-insulated square ring design seats flush on bus bars and terminal blocks
• CSA Certified, UL Listed, and RoHS Compliant

Compatibility

Designed as an OEM-style compression ring terminal for use in commercial and industrial electrical assemblies requiring a non-insulated square ring lug with a 5/8 inch stud size.

Installation Notes

Installation should be performed by a licensed electrician in accordance with NEC requirements for conductor terminations. De-energize and lock out the circuit before installing or removing any lug terminal. Use a calibrated compression crimping tool rated for the conductor gauge and terminal size being installed. Do not attempt to solder a compression-style terminal or substitute a mechanical connection where a crimped termination is specified.