Description
Heavy Duty Square Trailer Jack – 12,000 lb Support / 10,000 lb Lift | Side Pin | Spring Return | Weld-On | Part #40-414
Built for demanding trailer applications, this Heavy Duty 12,000 lb Square Trailer Jack delivers exceptional strength, smooth lifting, and dependable long-term performance. Featuring a 4" square weld-on tube, side pull pin, and spring return design, it’s engineered for serious work trailers including gooseneck, dump, equipment, and agricultural trailers.
The twin thrust bearing system provides smooth raising and lowering, while the spring return mechanism allows rapid retraction when released. A large, easy-to-operate pull pin ensures secure locking. Built-in grease zerk fittings allow hassle-free lubrication to maintain peak performance.
A durable exterior-grade black painted finish offers corrosion resistance, while the beveled shaft edges enhance safety by eliminating sharp contact points. The included footpad helps stabilize your trailer on a wide range of surfaces.
Key Features
- 12,000 lb support capacity / 10,000 lb lift capacity
- Heavy duty 4" square weld-on design
- Side pull pin with fast spring return
- Twin thrust bearings for smooth operation
- Grease zerks for easy servicing
- Corrosion-resistant black finish
- Footpad included for extra stability
- Includes handle and handle clip
Specifications
- Capacity: 12,000 lb support / 10,000 lb lift
- Style: Heavy Duty Square Weld-On
- Tube Size: 4" square
- Pin: Side pull pin
- Finish: Exterior-grade black paint
- Includes: Handle + clip, footpad
- Reference #: 40-414
Ideal For: Dump trailers, equipment trailers, gooseneck trailers, agricultural trailers, and commercial heavy-duty towing applications.
Frequently Asked Questions
- What is the capacity of this jack?
- This jack has a 12,000 lb support capacity and a 10,000 lb lift capacity.
- Is this jack weld-on or bolt-on?
- This is a heavy duty weld-on square trailer jack designed for permanent installation.
- Does this jack have a spring return system?
- Yes, it features a spring return mechanism activated by the side pull pin for fast retraction.
- Does it include a handle and footpad?
- Yes, this jack includes a handle with clip and a stability footpad.
- Is this jack easy to maintain?
- Yes, it includes grease zerk fittings for simple lubrication and long service performance.
Looking for a reliable Trailer Jack? You’re in the right place. TowParts offers premium replacement parts for your trailer.
Why Choose Our Trailer Jack for Your Trailer?
When it comes to towing safety and reliability, selecting the right Trailer Jack is absolutely critical. At TowParts, we understand that whether you are hauling heavy equipment, a recreational vehicle, or a simple utility trailer, every component plays a vital role in your journey. Our Heavy Duty Square Trailer Jack – 12,000 lb Support / 10,000 lb Lift – Side Pin is engineered to meet the highest industry standards, ensuring that you can tow with complete peace of mind.
Uncompromising Quality and Durability
Trailer parts face immense stress, weather exposure, and constant vibration on the road. That is why our Trailer Jack selection features heavy-duty materials designed to resist wear, tear, and corrosion. By upgrading to premium components, you significantly reduce the risk of on-road failures and extend the lifespan of your trailer. Regular maintenance combined with high-quality replacement parts is the secret to a trailer that lasts for decades.
The Importance of Proper Trailer Maintenance
Ignoring worn-out components can lead to catastrophic failures. We highly recommend inspecting your Trailer Jack regularly. Look for signs of stress, rust, or mechanical fatigue. Replacing a compromised Trailer Jack before your next long trip is a small investment that guarantees the safety of your cargo, your vehicle, and other drivers on the road. Always ensure that your replacement parts match your axle’s weight capacity and specifications.
Expert Support from TowParts
Finding the correct replacement part can sometimes be confusing, but TowParts is here to help. We pride ourselves on providing not just top-tier parts like the Heavy Duty Square Trailer Jack – 12,000 lb Support / 10,000 lb Lift – Side Pin, but also the expertise you need to get the job done right. We source directly from trusted manufacturers to bring you professional-grade trailer parts at competitive wholesale and retail prices.
Upgrade your setup today with the best Trailer Jack on the market and experience the difference that true quality makes. Safe towing starts with reliable parts, and TowParts is your dedicated partner for the long haul.

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