OEX ACX3145BL 250A Stud Single Terminal - Red

OEX ACX3145BL 250A Single Stud Terminal Red M8 Stainless Steel Stud on Glass Filled Nylon Base

The OEX ACX3145BL is a 250A single stud terminal in red, built around an M8 stainless steel stud mounted on a glass filled nylon base. Designed as a fixed, high-current connection point where multiple ring terminals can be stacked onto the stud and secured with a nut, consolidating multiple positive supply connections into a single, organised distribution point. Eliminates makeshift stacking at battery terminals and gives each circuit a clean, dedicated connection point. Supplied as a single unit. Covered by a one year warranty.

Product overview

In dual battery systems, 4WD and caravan builds and marine electrical panels, multiple high-current circuits often need to be connected to the same positive supply point. Stacking ring terminals directly onto a battery positive post creates a crowded, hard-to-service connection that risks overloading the post hardware. A single stud terminal provides a dedicated, remote distribution point where the main battery feed connects to the stud and each individual circuit connects its own ring terminal, giving each circuit a clean, accessible connection that can be removed and reinstalled individually without disturbing the others.

The 250A rating suits dual battery main feeds, winch circuits, inverter connections, compressor feeds and other high-draw loads sharing a common positive rail. The M8 stainless steel stud resists corrosion in underbonnet, marine and caravan environments. The glass filled nylon base provides electrical insulation, mechanical rigidity and heat resistance under sustained load. The red colour follows the standard automotive convention for positive terminals, making the distribution point immediately identifiable during installation, inspection and servicing.

Features and benefits

250A rating: Suitable for dual battery main feeds, winch circuits, inverter connections, compressor feeds and multi-circuit high-current accessory wiring sharing a common positive rail.

M8 stainless steel stud: Corrosion-resistant stud accepting standard M8-compatible ring terminals. Provides a secure, torque-resistant connection point for multiple cables stacked with a nut.

Glass filled nylon base: Electrically insulating, mechanically robust and heat-resistant. Provides a stable, non-conductive mounting platform for the stud in underbonnet and exposed installations.

Red colour coding: Identifies this as a positive/power distribution terminal per standard automotive wiring convention, distinguishing it from black earth terminals during installation and servicing.

Single unit: Install individually or pair with a matching black earth terminal to build a colour-coded positive and negative distribution point.

One year warranty: Covered by a one year OEX warranty.

Technical specs

Goes well with

OEX ACX3056 Ring Crimp Terminal 8.4mm ID Blue (suits M8 stud, 1.5 to 2.5mm² cable)

OEX ACX3057 Ring Crimp Terminal 10.5mm ID Blue (suits M8 stud, 1.5 to 2.5mm² cable)

Frequently asked questions

What is a stud terminal used for? A stud terminal provides a fixed, permanent connection point where multiple ring terminals can be stacked onto a single stud and secured with a nut. In automotive wiring, stud terminals centralise multiple positive supply connections or earth returns at a single point, keeping wiring tidy and reducing the risk of overloading a battery terminal with too many connections.

What ring terminal size suits the M8 stud? The M8 stud is 8mm in nominal diameter. Ring terminals with an 8.4mm ID or larger will fit over the stud. Suitable OEX options include the ACX3056 (8.4mm ID, blue, 1.5 to 2.5mm²) and ACX3057 (10.5mm ID, blue, 1.5 to 2.5mm²). Always confirm the ring terminal ID matches the stud diameter before purchasing.

Why is this terminal red? Red is the standard automotive colour convention for positive/power terminals, distinguishing them from black negative/earth terminals. Colour-coded terminals make it immediately clear which stud carries positive supply and which is the earth return, reducing wiring errors and making future servicing safer.

How many ring terminals can be stacked on one stud? The number of ring terminals that can be stacked depends on the stud's threaded length and the combined thickness of the terminal rings and any washers used. Ensure the nut has sufficient thread engagement when fully tightened.

Is a matching black earth terminal available? Check the OEX terminal range for a matching black single stud terminal for the earth/negative counterpart. Building a red/black pair gives a clean, colour-coded positive and negative distribution point for a professional installation.