COL4-8 Partex copper tube ring terminal, 4mm², M8 stud, pack 100

COL4-8 Partex copper tube ring terminal, 4mm², M8 stud, pack 100

Partex COL4-8 copper tube ring terminal designed for crimp termination of 4 mm² electrical conductors onto M8 stud connections, supplied in a pack of 100 for electrical panels, industrial wiring and equipment installations.

SKU: COL4-8MPN: COL4-8
Price
List Price £16.79 ex VAT
Your Price (ex VAT)
£16.79
£16.79 per pack of 100 · £0.17 each
Manufacturer Lead Time Please contact us for a delivery time before you order
Get the best trade prices Trade exclusive

Create a trade account to unlock exclusive pricing, special offers and more.

SUBTOTAL (EX VAT) £16.79
Trade pricing is personalised to your account

Manufacturer Lead Time

£16.79

Why Choose the Partex COL4-8 Copper Tube Ring Terminal?

The Partex COL4-8 is a copper tube ring terminal designed to provide secure electrical connections between conductors and stud-type terminals in electrical installations, control panels and industrial equipment. Suitable for 4 mm² conductors and featuring an M8 stud connection, this crimp terminal provides a practical solution for terminating electrical cables onto compatible threaded connection points.

As part of the Partex COL copper tube terminal range, the COL4-8 is designed for use with suitable crimping tools to create a dependable mechanical and electrical connection. Its copper construction provides excellent electrical conductivity, while the closed ring connection helps retain the terminal beneath the fastening screw or stud once correctly installed.

With a 4 mm² nominal conductor size and an M8 ring connection, the Partex COL4-8 is suitable for electrical termination applications requiring a secure bolted connection. Supplied in a convenient pack of 100 terminals, it is particularly useful for electricians, panel builders, electrical contractors and maintenance engineers requiring consistent cable termination components for installation and assembly work.

Key Advantages

  • Durable copper tube ring terminal designed for dependable electrical cable termination.
  • 4 mm² nominal conductor size for compatible electrical cables.
  • M8 stud connection provides secure attachment to suitable threaded terminals.
  • Copper construction offers excellent electrical conductivity.
  • Closed ring design helps maintain a secure connection beneath the fastening screw or stud.
  • Designed for crimp termination using appropriately selected crimping equipment.
  • Suitable for electrical control panels, distribution equipment and industrial installations.
  • Supports organised cable connections in electrical assemblies and machinery installations.
  • Suitable for applications requiring an M8 connection with a 4 mm² conductor.
  • Pack of 100 terminals provides convenient quantities for panel building and maintenance projects.

Key Features

  • Partex COL copper tube terminal range.
  • 4 mm² nominal conductor cross-section.
  • M8 stud size for compatible bolted electrical connections.
  • Conductive copper terminal construction.
  • Ring-type connection for secure stud mounting.
  • Tubular conductor entry designed for crimp termination.
  • Suitable for use with appropriately sized electrical conductors.
  • Designed for installation using compatible crimping tools and dies.
  • Suitable for industrial electrical and control panel wiring.
  • Useful for equipment connections, electrical assemblies and maintenance work.
  • Supplied in a pack containing 100 terminals.

Reliable Cable Termination for Electrical Installations

Copper tube ring terminals are commonly used in electrical installations where conductors require a secure connection to threaded terminals, busbar connection points or equipment terminals. The Partex COL4-8 provides a practical method of terminating a 4 mm² conductor onto an M8 stud, helping create a consistent electrical connection when installed using the correct crimping equipment and fastening procedures.

The Partex COL copper tube terminal range supports electrical panel assembly, equipment wiring and maintenance applications where dependable cable terminations are required. The tubular crimp barrel receives the conductor, while the ring-shaped connection end fits around the appropriate stud or fastening screw. Correct conductor preparation, crimp tool selection, terminal compatibility and tightening torque are essential to achieving a reliable connection. The installation should also be assessed against the applicable electrical current, voltage and environmental requirements.

Typical Applications

  • Industrial electrical control panels and switchgear assemblies.
  • Electrical distribution boards and terminal connections.
  • Motor control equipment and industrial machinery wiring.
  • Electrical cabinet and enclosure assembly.
  • Busbar and stud-type electrical connection points.
  • OEM electrical equipment manufacturing.
  • Industrial automation and control system wiring.
  • Electrical maintenance and cable replacement work.
  • Building services electrical installations.
  • General-purpose electrical cable termination using compatible 4 mm² conductors.

Technical Specifications

Tick the specs you need, then view products that match.

Material Copper
Device Type Copper Tube Lug
Conductor Size 4 mm²
Stud Size M8
Manufacturer Partex
Series COL Copper Tube Terminals
Model / Part number COL4-8
Product type Copper tube ring terminal
Terminal configuration Ring / eyelet
Nominal conductor cross-section 4 mm²
Stud size M8
Connection type Crimp termination
Terminal material Copper
Conductor connection Tubular crimp barrel
Mounting connection Stud / screw fastening
Packaging format Pack
Pack quantity 100 terminals
Primary application Electrical cable termination and stud connections
HS Code 74031900

Frequently Asked Questions

What is the Partex COL4-8 used for?

The Partex COL4-8 is a copper tube ring terminal used to terminate electrical conductors onto compatible M8 stud or screw connections. It is suitable for electrical control panels, industrial equipment and general cable termination applications.

What cable size is suitable for the Partex COL4-8?

The COL4-8 is designed for a nominal conductor cross-section of 4 mm². The conductor must be compatible with the terminal barrel and correctly prepared before crimping.

What stud size does the Partex COL4-8 fit?

The terminal features an M8 ring connection, allowing it to be secured to a compatible M8 threaded stud or screw terminal. The mating connection must be suitable for the terminal dimensions and the electrical installation.

How is the Partex COL4-8 installed?

The conductor is inserted into the copper tube crimp barrel and secured using a compatible crimping tool and die. The ring end is then positioned over the M8 stud and fastened according to the equipment manufacturer's installation requirements, including the specified tightening torque.

How many Partex COL4-8 terminals are supplied in each pack?

The Partex COL4-8 is supplied in a pack of 100 copper tube ring terminals, making it suitable for electrical panel building, industrial wiring and maintenance projects requiring multiple cable terminations.

Trusted by Electrical Installers and Panel Builders

Partex cable identification and termination products support professional electrical installation, industrial automation and control panel manufacturing. The COL4-8 copper tube ring terminal provides electricians, panel builders and maintenance engineers with a practical solution for connecting 4 mm² conductors to M8 stud terminals, supplied in a convenient pack of 100 for installation and maintenance work.

● Service Agreements

Credit Accounts

Our service agreements are built to support long term procurement relationships. By working closely with engineering teams and procurement departments, we help streamline purchasing processes while ensuring consistent access to critical components and sourcing support when it matters most.

 Priority sourcing and supply support

 Flexible payment terms for qualifying organisations

 Support for engineering, maintenance, and operations

500 +

Stock lines ready to ship

1,000 +

Same day dispatches

3500 +

Customers supported

28 

Trusted Manfacturers

● frequently asked questions

Common questions about our products and support

 

At Led Controls Ltd we help engineers source the right automation and control gear with confidence. below are quick answers to what we are asked most often.

What product ranges do you supply

We supply all leading manfacturers in our industry. we offer next day delivery on most poplour products. 

Can you help specify the correct part?

Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.

Do you have stock for urgent orders?

Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.

What are your delivery times and costs?

Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.

What about warranties, returns and faulty items?

Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.

● latest blog

Discover  our latest insights and
expert advice

From a Simple Idea to Small Business of the Year: The LED Controls Story So Far…

From a Simple Idea to Small Business of the Year: The LED Controls Story So Far…

LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.

LED Controls: Danfoss Drives Authorised Partner

LED Controls: Danfoss Drives Authorised Partner

2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...

LED Controls: Your Complete Control Panel Solution

LED Controls: Your Complete Control Panel Solution

2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...