M8 Junction Block – Single Stud, 150A

This M8 junction block gives you a solid, insulated connection point for joining or distributing heavy cables in 4WD, ute, caravan and camper 12V systems. Instead of stacking lugs on a battery terminal, land them on a dedicated stud that’s mounted where you need it. The block is rated to 150A and carries a single M8 stainless steel stud with nuts on a plain nylon base that insulates it from the mounting surface.

It’s available in red for positive, black for negative, or as a red and black pair, so polarity is clear at a glance.

Key Features

• 150A rated single stud power or earth junction point
• M8 stud accepts any cable lug with an 8mm (5/16″) stud hole
• Stainless Steel stud and nuts
• Nylon insulating base keeps the stud isolated from the mounting surface
• Two mounting ears for a secure screw-down installation
• Colour-coded red or black, or buy as a pair

Specifications

What This M8 Junction Block Suits

• Remote positive and earth points in dual battery setups
• Joining or splitting heavy cable runs in a canopy, tray or drawer system
• Tidy connection points in battery boxes and caravan or camper 12V builds
• Taking extra lugs off the battery terminal to a dedicated, mounted stud

Pair it with Bluebar cable lugs and automotive cable for a clean, properly terminated install.

Built to spec. Made for the track.

Frequently Asked Questions

What is an M8 junction block used for?

An M8 junction block gives you a mounted, insulated stud to join or distribute heavy cables in a 12V system. It’s commonly used to create remote positive or earth points so you’re not stacking lugs on the battery terminal.

What current is this junction block rated for?

This single stud junction block is rated to 150A. Make sure your cable, lugs and fusing all suit the load you’re running through it.

What lugs fit an M8 stud?

Any cable lug with an 8mm stud hole fits, often listed as M8 or 5/16″. Choose the lug barrel to match your cable size.

What’s the difference between the red and black blocks?

The block is the same; only the colour differs. Red is conventionally used for positive and black for negative or earth, so the colours make polarity easy to identify.

Can I buy a red and black pair?

Yes. It’s available as a single red block, a single black block, or a red and black pair.

Is this junction block Australian Made?

No, this junction block is not Australian Made. It’s part of Bluebar’s range of quality-checked 12V accessories that complement our Australian Made power leads.