OEX ACX3146-M10BL 250A Single Stud Terminal M10 - Black

OEX ACX3146-M10BL 250A Single Stud Terminal M10 - Black

Consolidate negative and earth circuits at a clean, dedicated connection point with the OEX ACX3146-M10BL 250A Single Stud Terminal, featuring a 10mm stainless steel stud rated to 250A, glass-filled nylon base for superior strength and heat resistance, and black colour coding for immediate negative/earth rail identification in automotive, marine, 4WD, caravan, RV, mining, and industrial high-current electrical installations.

Product Overview

The OEX ACX3146-M10BL is the black-coded negative/earth counterpart to the ACX3145-M10BL red positive terminal, providing a dedicated M10 stainless steel stud connection point for consolidating earth returns and negative circuit feeds in high-current automotive and marine electrical systems. The M10 stud accommodates heavier gauge cable lugs used with 0 B&S, 00 B&S, and other large gauge wire, making the ACX3146-M10BL the preferred choice for demanding earth distribution applications where the heavier cable gauges used in high-current systems require a larger lug hole size than an M8 stud provides. In professional electrical builds, a clean, dedicated earth terminal is just as critical as the positive distribution point. Poor or improvised earth connections are among the most common causes of electrical faults, voltage drop issues, and audio system noise in vehicles. The ACX3146-M10BL provides a properly rated, surface-mounted earth consolidation point where multiple circuit earth cables can be stacked cleanly onto a single stud rather than crowded onto a chassis bolt or improvised earth point, maintaining reliable, low-resistance earth connections essential for stable electrical system performance. Rated to 250A continuous, the ACX3146-M10BL handles the combined earth current of multiple high-current circuits without thermal stress. Glass-filled nylon base construction delivers superior heat resistance and structural rigidity over standard nylon, while the 10mm stainless steel stud resists corrosion and maintains reliable clamping over years of service. Used alongside the ACX3145-M10BL red positive terminal, the ACX3146-M10BL forms a complete colour-coded M10 positive and negative terminal pair for professional high-current electrical builds. ISO 9001-certified manufacturing and in-house testing at OEX's Brisbane facility ensures consistent quality and long-term reliability.

Features & Benefits

10mm Stainless Steel Stud for Heavy Gauge Earth Applications: The M10 stainless steel stud accommodates larger cable lug hole sizes used with heavy gauge wire including 0 B&S and 00 B&S, providing a more comfortable fit for large earth cable lugs compared to M8 studs while delivering the same corrosion resistance and long-term mechanical integrity under vibration and thermal cycling.

250A Continuous Rating for Demanding Earth Systems: Rated to 250A continuous, the ACX3146-M10BL handles the combined earth current of multiple high-current circuits simultaneously, suitable for large amplifier earth consolidation, inverter earth connections, dual battery negative feeds, 4WD multi-accessory earth bars, and commercial vehicle auxiliary earth distribution.

Glass-Filled Nylon Base for Superior Strength and Heat Resistance: Glass-filled nylon construction provides significantly greater rigidity, impact resistance, and thermal stability compared to standard nylon, resisting deformation and cracking in high-temperature environments including engine bays, amplifier enclosures, and industrial equipment installations where sustained heat exposure is a concern.

Black Colour for Negative/Earth Rail Identification: The black base provides instant identification as a negative or earth terminal, reducing wiring errors in installations where multiple terminals are mounted in close proximity, essential for maintaining professional installation standards and simplifying future fault-finding.

Direct Pair for ACX3145-M10BL Red Positive Terminal: The ACX3146-M10BL is the colour-matched negative counterpart to the ACX3145-M10BL red M10 single stud terminal, forming a complete professional positive and negative distribution terminal pair with consistent construction, stud sizing, current rating, and base material across both polarities.

Multiple Cable Lugs Accepted for Earth Consolidation: The single M10 stud accepts multiple stacked cable lugs, making the ACX3146-M10BL ideal for consolidating multiple earth returns at a single rated connection point, a clean and professional alternative to crowded chassis bolt earth points in complex high-current electrical builds.

ISO 9001 Certified Manufacturing: Produced under ISO 9001 quality management certification with in-house product testing at OEX's Brisbane facility, ensuring every unit meets stringent engineering and quality control procedures for reliability across automotive, marine, mining, industrial, and RV applications.

Technical Specs

Compatible With / Goes Well With

The OEX ACX3146-M10BL suits 12V and 24V automotive, marine, caravan, RV, 4WD, mining, and commercial vehicle electrical systems requiring a dedicated 250A-rated M10 single stud connection point for negative or earth distribution. Ideal for heavy gauge earth cable applications using 0 B&S and 00 B&S wire, amplifier earth consolidation, inverter earth connections, dual battery negative feeds, and multi-circuit earth straps in professional electrical builds. Pairs directly with the OEX ACX3145-M10BL red M10 single stud terminal for a complete colour-coded positive and negative terminal pair. The M8 black variant ACX3146BL is available for lighter gauge applications. Complements OEX distribution blocks, ANL fuse holders, busbars, and battery terminals for complete high-current power management solutions.

Frequently Asked Questions

What is the difference between the ACX3146-M10BL and the ACX3145-M10BL?

The ACX3146-M10BL is the black-coded negative/earth variant and the ACX3145-M10BL is the red-coded positive variant. Both share identical construction with a 10mm stainless steel stud, glass-filled nylon base, and 250A continuous rating. Use the ACX3145-M10BL for positive distribution and the ACX3146-M10BL for negative/earth distribution to form a complete, clearly colour-coded M10 terminal pair.

What is the difference between the ACX3146-M10BL and the M8 black stud terminal?

The ACX3146-M10BL uses a larger 10mm stainless steel stud while the M8 variant uses an 8mm stud. The M10 stud accommodates larger cable lug hole sizes used with heavy gauge wire such as 0 B&S and 00 B&S, making it the preferred choice for high-current earth installations using the heaviest cable gauges. Choose the M10 variant when your cable lugs require a 10mm hole, and the M8 variant for standard lighter gauge earth applications.

How many cable lugs can be stacked on the ACX3146-M10BL stud?

The number of cable lugs that can be stacked depends on the thickness of each lug and the available thread engagement length on the M10 stud. In practice, two to four standard automotive cable lugs can typically be stacked safely. The combined current draw of all connected circuits must remain within the 250A continuous rating, and the stud nut must be firmly torqued to maintain secure clamping force across all stacked lugs.

Is the ACX3146-M10BL suitable for marine and outdoor installations?

The stainless steel stud and glass-filled nylon base provide good corrosion and moisture resistance suitable for marine, outdoor, and under-bonnet applications. For best long-term performance in marine environments, use tinned copper cable lugs and apply dielectric grease to stud and lug contact surfaces before assembly to prevent oxidation and galvanic corrosion at the connection points.

Why is a dedicated earth stud terminal better than connecting to a chassis bolt?

A chassis bolt earth relies on paint-free metal-to-metal contact that can corrode, loosen over time, and increase earth resistance leading to electrical faults, voltage drop, and audio system noise. The ACX3146-M10BL provides a dedicated, rated stainless steel stud specifically designed for cable lug termination, delivering a lower-resistance, more reliable, and more serviceable earth connection point with clear polarity identification and a consistent, professional finish.