EZ Loader U-Bolt 1/2" -13 x 3 x 7-1/4" Zinc Plated 290-002516

U-Bolt 1/2"-13 x 3" x 7-1/4" Zinc Plated 290-002516

EZ Loader Trailer U-Bolt

The U-Bolt 1/2"-13 x 3" x 7-1/4" Zinc Plated 290-002516 is a replacement trailer hardware fastener used on compatible EZ Loader boat trailers. This U-bolt measures 1/2"-13 thread x 3" inside width x 7-1/4" length and is designed for trailer hardware locations where a longer U-shaped clamp fastener is required.

U-bolts are commonly used to secure trailer components around frames, brackets, crossmembers, bunk supports, roller supports, and other trailer hardware locations depending on the trailer model and setup. Correct measurement matters because U-bolts are not universal. The diameter, thread pitch, inside width, leg length, and bend shape all need to match the trailer application.

The zinc-plated finish helps reduce corrosion in marine trailer use. Zinc plating acts as a sacrificial coating, meaning the zinc helps corrode before the underlying steel. This makes zinc-plated U-bolts a practical factory-style hardware choice for boat trailers exposed to road spray, freshwater, saltwater, humidity, and ramp use.

U-Bolt 1/2"-13 x 3" x 7-1/4" Features

• Replacement zinc-plated U-bolt for compatible EZ Loader trailer hardware
• 1/2"-13 coarse-thread design
• 3" inside width
• 7-1/4" length
• Useful for trailer bunk, bracket, roller, frame, or suspension-related hardware service
• Helps replace rusted, bent, worn, or missing U-bolts

Typical EZ Loader Trailer Applications

This U-bolt may be used on compatible EZ Loader trailer hardware where a 1/2"-13 x 3" x 7-1/4" zinc-plated U-bolt is required. Common use areas may include bunk hardware, bracket hardware, roller supports, frame-mounted hardware, guide hardware, and suspension-related fastening points depending on the trailer model.

Because EZ Loader trailers use multiple U-bolt sizes, always compare the old U-bolt, bracket location, thread size, inside width, and leg length before ordering.

Why EZ Loader Uses Zinc-Plated U-Bolts

EZ Loader uses zinc-plated hardware in many trailer applications because it provides a practical balance of strength, corrosion resistance, serviceability, and cost. The zinc coating helps protect the steel fastener and slows corrosion in wet, humid, freshwater, and saltwater trailer environments.

Zinc plating acts as a sacrificial layer. In simple terms, the zinc coating is designed to corrode before the steel underneath. This helps reduce rust on the bolt and limits corrosion around the hardware contact point when the trailer is exposed to water, salt, and road spray.

For best results, replace U-bolts that are heavily rusted, bent, stretched, rounded, or damaged during trailer service.

Important Difference: U-Bolt Width and Length Matter

This part is a 1/2"-13 x 3" x 7-1/4" U-bolt. The inside width and leg length must match the trailer hardware location.

A U-bolt that is too narrow may not fit around the frame, bracket, or part being clamped. A U-bolt that is too wide may not hold the component correctly. A U-bolt that is too short may not allow proper nut engagement, while one that is too long may interfere with nearby trailer parts.

Associated / Compatible Parts

These parts may be commonly used with compatible EZ Loader U-bolt hardware. Confirm your specific application before ordering.

Installation Considerations

• Confirm the old U-bolt dimensions before ordering.
• Measure the thread size, inside width, and overall leg length.
• Inspect the bracket, frame, mounting plate, and mating hardware before reassembly.
• Use compatible 1/2"-13 nuts and washers if required by the application.
• Replace bent, rusted, stretched, cracked, or damaged U-bolts before towing.
• Do not reuse U-bolts that show heavy corrosion, thread damage, or deformation.
• Tighten hardware to the proper specification for the trailer application.

U-Bolt Fitment Guidance

This is not a universal trailer U-bolt.

• Confirm the thread size is 1/2"-13.
• Confirm the inside width is 3".
• Confirm the length is 7-1/4".
• Confirm the shape and bend radius match the trailer application.
• Compare the old U-bolt and mounting location before ordering.

Real-World Insight

U-bolts often look simple, but they carry clamping load in important trailer hardware locations. If the U-bolt is stretched, bent, heavily rusted, or has damaged threads, it may not clamp correctly. When replacing trailer brackets, bunks, rollers, suspension hardware, or frame-mounted parts, matching the correct U-bolt dimensions helps keep the assembly secure.

Questions or Need Help Matching Parts?

We’re based in Hardeeville, South Carolina, serving customers nationwide.

📞 Call us — we answer the phone and help you get it right.
📧 Send photos if needed — often the fastest way to confirm U-bolt size, bracket location, and trailer hardware fitment.

We focus on matching parts correctly the first time.

What to Have Ready When You Call

• Trailer year, make, and model
• VIN, if available
• Old U-bolt thread size
• Inside width measurement
• Overall leg length measurement
• Hardware location on the trailer
• Photos of the old U-bolt, bracket, frame, or mounting location