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RS PRO Uninsulated Ring Terminal E245391, 5.3 mm Stud, 14 - 12 AWG, 4mm², 9.5mm OD, Copper, Tin Plated, Grey, 178-8612
Specifications
| Country of Origin | Taiwan |
|---|---|
| Brand | RS PRO |
| Colour | Grey |
| THICKNESS | 1mm |
| Model | 178-8612 |
| Insulation | Uninsulated |
| Overall Length | 20mm |
| Contact Material | Copper |
| Series | E245391 |
| Maximum Operating Temperature | 150°C |
| Minimum Operating Temperature | -40°C |
| Contact Plating | Tin |
| Minimum Wire Size mm² | 2.5mm² |
| Maximum Wire Size mm² | 4mm² |
| Minimum Wire Size AWG | 14AWG |
| Maximum Wire Size AWG | 12AWG |
| Outer Ring Diameter | 9.5mm |
| Inner Ring Diameter | 5.3mm |
| Stud Size | 5.3 mm |
Key Features
- Uninsulated ring terminal designed for secure electrical crimp connections.
- Supports 14 AWG to 12 AWG wire sizes or 2.5 mm² to 4 mm² conductors.
- Features a 5.3 mm stud size for standard hardware compatibility.
- Manufactured from high-quality copper and tin plated for corrosion resistance.
- Offers a 9.5 mm outer ring diameter with an overall length of 20 mm.
- Grey color for clear identification in wiring assemblies.
- Performs in extreme temperatures from -40°C to 150°C.
- Ideal for control panels, industrial automation, and electrical distribution.
Product Description
The RS PRO 178-8612 is an uninsulated ring terminal designed for making secure crimp terminations on electrical wires in control panels, junction boxes, and industrial machinery. This specific terminal is suited for conductor sizes from 14 AWG (2.5 mm²) up to 12 AWG (4 mm²), making it versatile for a range of low to medium current wiring applications.
With its 5.3 mm stud size, the terminal conveniently fits commonly used mounting bolts and screws. It features an outer ring diameter of 9.5 mm and an overall length of 20 mm, ensuring compatibility with tight spaces in dense wiring assemblies for automation, electrical distribution, or instrumentation panels.
The body of the ring terminal is manufactured from high-purity copper, providing excellent electrical conductivity. Its tin-plated finish enhances corrosion resistance and maintains stable performance over time, especially in humid or challenging industrial environments. The 1 mm thickness adds mechanical durability, making the terminal ideal for both rigid and flexible copper conductors.
Designed without insulation, the terminal allows direct crimping using suitable hand tools. The grey color coding helps in rapid circuit identification during installation, routine checks, or maintenance routines. The component operates reliably in temperature ranges from -40°C up to 150°C, supporting robust operations in environments ranging from cold storage to industrial process lines.
RS PRO’s ring terminals like this model are widely used in manufacturing, process control, panel building, HVAC systems, and other electrical engineering fields where safe and permanent wire-to-post connections are required. The uninsulated design is suitable for professional users who require a compact solution and will handle insulation at the wire or enclosure level.
The package includes one uninsulated ring terminal as specified. Always select appropriate wire size and crimping tool to ensure a reliable connection and consult electrical codes for your region during installation.
Explore more high-quality RS PRO wiring accessories on EnvMart for your professional electrical projects.
Explore more products in our Wire Terminal category.
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Frequently Asked Questions
This uninsulated ring terminal supports wire sizes from 14 AWG (2.5 mm²) to 12 AWG (4 mm²).
The stud size for this model is 5.3 mm, allowing it to fit standard mounting hardware.
The outer ring diameter of this terminal is 9.5 mm, which facilitates compatibility in tight wiring assemblies.
It is made from high-purity copper and features a tin plating for enhanced corrosion resistance.
This ring terminal operates effectively in temperatures ranging from -40°C to 150°C.
The overall length of this terminal is 20 mm, making it suitable for various applications.
This terminal is uninsulated, allowing for direct crimping without insulation.
The thickness of this terminal is 1 mm, contributing to its mechanical durability.
The country of origin for this model is Taiwan.
It is ideal for use in control panels, industrial automation, and electrical distribution.
This model is grey, which aids in clear identification during wiring assemblies.
When installing, ensure to select the appropriate wire size and crimping tool to achieve a reliable connection.
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