Weather Guard 185 Lo-Side Truck Tool Box, 41 in Gloss Black Steel (185-5-04)

Keep tools locked down and off the bed floor with the Weather Guard 185-5-04 lo-side truck tool box. This 41" box wears a gloss black ARMOR TUF finish over welded steel. Gloss black over steel gives you a blacked-out look with the extra strength and weight that only a steel box brings. It mounts on top of one bed side rail so it rides low, preserves your rear visibility and leaves the bed floor open for sheet goods and cargo, and it locks down 3.0ft³ of weather-sealed storage behind the tamper-resistant 1Key UltraLock push-button lock.

What's Included:

• 185 Series 41" Lo-Side steel truck tool box in gloss black
• 1Key UltraLock keyed cylinder with recessed red push-button latch
• Under-rail mounting clamps and hardware for a no-drill install
• Gas strut for controlled lid lift
• Removable tray
• Full-perimeter weather seal, pre-installed
• Drain plug
• Weather Guard installation instructions

Features

41" of Secure Side-Rail Storage
At 41" long the 185-5-04 runs along one bed side rail and gives you 3.0ft³ of lockable, organized storage while keeping the rest of the bed floor clear. The compact footprint fits full-size and mid-size trucks and leaves room for larger cargo.

Gloss Black Steel Finish
A Gloss Black ARMOR TUF powder coat covers the welded steel body to fight rust, salt and UV fade while giving the box a deep, blacked-out shine. Steel adds strength and heft for the toughest jobsites, so it takes abuse a lighter box might not.

Blacked-Out Strength
Gloss black over welded steel pairs a deep, blacked-out look with real heft, so it fits a blacked-out truck while standing up to the roughest use. It is the pick when you want steel toughness and a dark finish together.

Heavy-Duty Welded Steel Build
The 185-5-04 is built from welded steel for maximum strength and heft, so it stands up to the toughest jobsites, and it is made in the USA and backed by a Weather Guard Limited Lifetime Warranty against defects.

1Key UltraLock Security
A tamper-resistant lock pairs a keyed cylinder with a recessed red push-button that sits flush when locked, giving you a quick visual cue your gear is secured. The 1Key system lets you code multiple boxes on a truck or a whole fleet to one key.

Low-Side Rail Mount
The Lo-Side design sits on top of one bed side rail and stays low, so it does not block your rear window and leaves the bed floor open for hauling. It mounts on either the driver or passenger side rail, whichever suits your loading.

Reinforced Body, Automotive-Grade Hardware
Weather Guard specifies a heavy-duty welded body for the 185-5-04, with a C-channel reinforced front panel and a heavy-duty C-channel reinforced lid, so the box stays square when it is loaded and when someone stands on the lid. The latch is an automotive dual-stage rotary mechanism, the same style a truck door uses, so it pulls the lid down onto the seal instead of relying on a friction catch. A welded gas strut shield keeps loose tools from knocking the strut mount out of line. The D-shaped ribbed weather strip is memory resistant, so it springs back after years of closing rather than taking a set and letting water track in.

Fitment & Compatibility

Specifications

• Series: 185 Series Lo-Side
• Style: 41" single-lid side-mount (Lo-Side)
• Storage Capacity: 3.0ft³
• Exterior Dimensions: about 41"L x 17"W x 13"H
• Material: Welded steel
• Finish: Gloss Black ARMOR TUF powder coat
• Lid: Reinforced, opens to about 90 degrees, gas strut
• Lock: 1Key UltraLock keyed cylinder with recessed red push-button, tamper-resistant, keyed alike
• Weather Seal: Full-perimeter, multi-ridge weather seal
• Mounting: Sits on top of one bed side rail, under-rail clamps and hardware included, no drilling required
• Electrical: 12V access for electrical upfits
• Drainage: Drain plug
• Construction: Heavy Duty Welded
• Front Panel: C-Channel Reinforced
• Lid Construction: Heavy Duty C-Channel Reinforced
• Latch Mechanism: Automotive Dual-Stage Rotary
• Weather Strip Profile: Memory Resistant D-Shaped Ribbed
• Gas Strut Protection: Welded Gas Strut Shield
• Bed Style: Style Side
• Body Gauge: 18-ga
• Shipping Size: 43-1/2"L x 19"W x 14"H, 63.5 lb
• UPC: 783965071420
• Weight: About 63.5 lb (shipping)
• Warranty: Limited Lifetime
• Made In: USA

Installation

Type: Side-rail mount, clamp-in with no drilling  ·  Time: About 20 to 30 minutes  ·  Tools: Socket or wrench set and a tape measure; no drill needed with the included under-rail clamps  ·  Difficulty: Easy, one person can handle this short box

Set the box on top of one bed side rail and position it front to back, then hook the included clamps under the rail lip and tighten the hardware evenly so the box sits flat and the lid seals. Follow the Weather Guard installation instructions for exact clamp placement and torque.

Watch the installation walkthrough:

Resources

Everything you need for your Weather Guard 185 Lo-Side Truck Tool Box, 41" Gloss Black Steel, in one place.

• Official Weather Guard 185 Lo-Side Truck Tool Box, 41" Gloss Black Steel installation manual (PDF), the manufacturer's step-by-step guide covering mounting, included hardware and torque specs.

Warranty, Shipping & Returns

Warranty. Limited Lifetime Warranty from Weather Guard against defects in materials and workmanship.

Free shipping. This item ships free to the lower 48 states. Because it is an oversized item, it ships by freight and typically arrives in 3 to 7 business days.

Inspect on delivery. Please inspect the packaging before signing. If you see any damage, note it on the delivery receipt and contact us right away, and we will make it right.

Returns. Unused items in their original packaging can be returned within 30 days of delivery. If an item arrives damaged, defective or wrong, return shipping is on us. See our Returns & Refunds Policy, or email support@prestigetruck.com with any question.

About Weather Guard

Weather Guard has built professional-grade truck and van storage in the USA for decades and is the storage brand tradespeople, contractors, and fleets reach for first. Its steel and aluminum tool boxes, ladder racks, and van-interior systems are engineered to survive daily jobsite abuse and keep expensive tools secure and organized.

Known for weather-tight seals, patented locking systems, and heavy-gauge construction, Weather Guard products mount cleanly on work trucks and vans and stand up to years of hard use. The lineup spans crossover, low-side, and saddle truck boxes, ladder and van racks, drawer units, and fuel and utility tanks, so an entire work vehicle can be outfitted from one brand.

Backed by a strong manufacturer warranty and US-based support, Weather Guard is the name pros trust to protect the tools their livelihood depends on.