Milwaukee Packout Triple Mounting Plate, XL, Undermount

Massive Organized Storage with the Cleanest Triple-Wide Footprint

Stop wasting vertical space and sprawling your gear across multiple small brackets. The BOCO Custom Triple Wide Packout Mounting Plate is the ultimate solution for high-capacity storage. Engineered to hold three Milwaukee Packout boxes side-by-side (or one double-wide + one single), this plate is laser-cut from 14-gauge American steel to provide a professional, rock-solid foundation that outlasts and outperforms plastic alternatives.

The XL Low-Profile Advantage

• Maximum Storage Density: This plate allows you to unify your entire Packout ecosystem onto a single, level plane—perfect for van interior walls or above workbenches.
• Ultra-Slim 0.5" Profile: Unlike bulky OEM mounts, our slim design keeps your boxes tucked tight against the wall, preserving valuable aisle space in trailers and service bodies.
• Multi-Box Compatibility: Engineered to accept all standard Milwaukee Packout footprints, including full-width organizers, half-width compact boxes, and double-wide drawers.
• Built for Pros: 14-gauge steel provides the perfect balance of lightweight efficiency and industrial-strength durability for daily shop or mobile use.

INSTALLATION NOTE: This triple-wide plate is ideal for mounting across wall studs, securing to ATVS, or to van ribbing. Toolbox & Mounting Hardware not included

Robust Design for Heavy-Duty Use

The Milwaukee Packout Triple Mounting Plate is engineered for professionals who demand rugged and reliable equipment. Made from high-strength materials, this XL undermount plate offers exceptional durability to withstand harsh job site conditions. Its robust design ensures secure attachment to your Packout storage system, providing stable support for oversized and heavy tools. The plate’s reinforced construction lowers the risk of wear and tear, extending the lifespan of your storage accessories.

Effortless Installation and Compatibility

Designed with user convenience in mind, the Milwaukee Packout Triple Mounting Plate installs quickly and easily without requiring special tools. The XL undermount model fits seamlessly into the Milwaukee Packout modular system, allowing you to customize your tool storage efficiently. Compatible with multiple Packout cases and organizers, it enables you to create a versatile setup tailored to your specific needs, keeping your workspace organized and accessible at all times.

Enhanced Storage Capacity and Organization

This triple mounting plate expands your storage potential by providing additional mounting points for multiple Packout units. It allows you to stack and secure three storage containers side-by-side, enhancing your toolkit’s organization and transport convenience. The undermount design optimizes space utilization, making it easier to carry bulky tools safely and securely. With the Milwaukee Packout Triple Mounting Plate XL, you gain a practical and professional-grade solution that improves efficiency and productivity on every job.

10-Gauge Steel (0.1345" | Thickness of Two Stacked Dimes)

• Best For: Heavy-duty commercial wall mounts, shop workbenches, and massive modular tool stacks.
• The Advantage: Extreme structural stiffness. This ultra-thick steel completely eliminates flexing, twisting, and tool rattling, making it the definitive choice for demanding daily job-site use.

12-Gauge Steel (0.1046" | Thickness of a Standard House Key)

• Best For: Mobile service vans, enclosed trailers, and standard shop organization layouts.
• The Advantage: The ultimate sweet spot between bulletproof strength and smart weight distribution. It handles constant over-the-road vibrations flawlessly without adding unnecessary bulk to your mobile rig.

14-Gauge Steel (0.0747" | Thickness of a Nickel)

• Best For: Handheld battery organizers, small tool holsters, and lightweight shelf accessories.
• The Advantage: High-tensile rigidity in a streamlined profile. It provides a rock-solid, permanent mount for smaller gear while keeping your workspace layout clean and low-profile.

8-Gauge Aluminum (0.1285" | Heavy-Duty Marine Grade)

• Best For: Open truck beds, roof racks, exterior trailer sides, and high-moisture environments.
• The Advantage: Maximum corrosion resistance with severe weight savings. Shaved pounds keep your mobile fuel efficiency optimized while remaining completely immune to rain, snow, and road salt oxidation.

10-Gauge Stainless Steel (0.1345" | Thickness of Two Stacked Dimes)

• Best For: Premium exposed truck bed brackets, marine applications, high-end shop builds, and ultimate weather protection.
• The Advantage: Combines the absolute, unyielding structural rigidity of our thickest 10-gauge plate with total lifetime corrosion resistance. It requires no paint or powder coat to stay 100% immune to rust, road salt, and harsh outdoor elements.

Note: Sheet metal gauge numbers run inversely—the lower the gauge number, the thicker and more rigid the actual metal substrate is.

We fabricate our mounting solutions and accessories using commercial-grade materials built for harsh environments. Choose the right finish for your build and review our care recommendations below:

Textured Black Powder Coat

• What it is: An industrial-grade, chip-resistant finish applied over media-blasted metal. Ready to install out of the box and engineered to survive heavy daily tool friction.
• Care: Low maintenance. Wipe down occasionally with a damp microfiber cloth to remove dust or workspace grime. Avoid using harsh chemical solvents or abrasive pads that could scratch the protective coating.

Raw Steel

• What it is: Shipped as premium raw American steel that has been completely precision laser-cut, sanded, and deburred. Perfect for fabrication shops or DIYers who want to weld the brackets directly to a rig or custom paint them.
• Care: ⚠️ MUST BE COATED UPON ARRIVAL. Raw steel will oxidize and develop surface rust if exposed to moisture or air humidity. Wipe with a prep solvent or isopropyl alcohol to remove any fingerprint oils, then apply a high-quality metal primer and topcoat (or send it to your local powder coater).

Raw Aluminum

• What it is: Clean, lightweight, and completely rust-proof. Engineered specifically for high-moisture setups, open truck beds, or exterior trailer sides.
• Care: Naturally corrosion-resistant. Aluminum will develop a dull patina over time when exposed to the elements, which is completely normal and acts as a natural protective layer. To maintain a bright look, clean occasionally with a mild soap and water solution or a dedicated aluminum polish.

Hand-Painted Finishes (Custom Accents)

• What it is: Custom badges, logos, and accent configurations individually detailed and finished by hand right here in Apple Valley.
• Care: Handle with care during installation to prevent surface marring. Clean only with mild dish soap and water. Do not use brake cleaner, acetone, or heavy degreasers on hand-painted surfaces, as these chemicals will strip or dissolve the finish.