Thomas Betts RA18-4 Ring Terminal 22-16 Awg Crimp 4 Stud

Product Description

The THOMAS BETTS RA18-4 is a partially insulated, D-shaped ring terminal designed for crimp connections on 22 to 16 AWG copper wire. The contact is made from copper with a TiN (titanium nitride) plating for reliable conductivity and corrosion resistance. The nylon insulation sleeve is red, conforming to the standard color code for 22 to 16 AWG wire range. At 0.72 inches long and 0.23 inches wide, this terminal fits a number 4 stud and delivers a secure, low-resistance termination. It meets UL 486A, UL 486B, UL 94 V-2, and CSA 22.2 standards, making it suitable for professional electrical work where listed components are required.

This ring terminal is used in residential and light commercial electrical applications wherever small-gauge wire must be terminated to a screw or stud connection. Typical installation scenarios include control wiring in HVAC equipment, panel sub-circuits, appliance wiring, and low-voltage control boards. Electricians and HVAC technicians reach for this terminal when connecting 22 to 16 AWG wire to a number 4 stud in any environment where a clean, code-compliant crimp termination is required. The red color coding allows fast visual identification during installation and inspection.

Key Features

• Partially insulated nylon sleeve rated to UL 94 V-2 flame resistance
• Copper contact with TiN plating for conductivity and corrosion resistance
• Crimp connection type — compatible with standard ratchet crimp tools
• Fits number 4 stud; overall dimensions 0.72 inches long by 0.23 inches wide
• Red color coding matches 22 to 16 AWG industry standard
• UL Listed under UL File E9809; RoHS Compliant

Compatibility

Designed for use with 22 to 16 AWG copper wire terminated to a number 4 stud in crimp-style ring terminal applications.

Installation Notes

Installation should be performed by a qualified electrician in accordance with NEC requirements for wire terminations. Always de-energize the circuit before installing or inspecting crimp terminals. Use a calibrated ratchet crimp tool sized for 22 to 16 AWG terminals to ensure a proper gas-tight crimp — do not use pliers or uncalibrated tools as they can result in a high-resistance or pull-out failure. Inspect the insulation sleeve after crimping to confirm it has not cracked or separated from the barrel.