Meet the National Hardware 1/2 in. X 4 in. W X 6-1/2 in. L Coarse Zinc-Plated Steel U-Bolt — a dependable, medium-duty clamp built to secure round objects with precision and ease. Designed for everyday projects and shop fixes, this U-bolt combines sturdy steel with a protective zinc finish to resist the rigors of indoor and light outdoor use.
Key specifications
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Diameter: 1/2 in. steel
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Inside length: 6-1/2 in.
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Inside width: 4 in.
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Finish: Zinc-plated for corrosion resistance
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Material: Steel
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Thread type: Coarse
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Thread size: 1/2
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Packaging: Carded • 1 piece
What you can secure with this U-bolt
Use this U-bolt to anchor pipes, conduit, or tubing to walls, frames, or supporting surfaces. With a 4-inch inside width and a 6-1/2-inch inside length, it’s well-suited for medium-sized round objects and provides a robust grip that stays put under typical vibrations found in plumbing, HVAC, and automotive applications. The 1/2-inch diameter rod and coarse threads make for straightforward installation with standard nuts and washers, saving time on the job.
Why the zinc-plated steel matters
The zinc-plated finish delivers solid corrosion resistance for indoor work and sheltered outdoor projects. It provides a reliable barrier against moisture and humidity, helping extend the life of the fastener in everyday environments. If your project faces harsher conditions or salt exposure, consider dedicated corrosion-resistant options as a next-step upgrade.
Ideal use cases
- Securing plumbing pipes or conduit to studs, joists, or brackets
- Mounting tubing along fences, frames, or vehicle racks
- Creating stable supports for light-duty railing, guard rails, or equipment mounts
- Temporary or semi-permanent installations where quick, secure clamping is needed
Installation tips
- Pair the U-bolt with appropriate nuts and flat or lock washers to distribute load and prevent loosening.
- Ensure the object you’re securing sits evenly within the inside width before tightening.
- Hand-tighten first, then snug with a wrench to avoid over-tightening and potential deformation of the U-bolt.
- Inspect periodically in environments with vibration or moisture and re-tighten as needed.
Who this is for
Ideal for DIY enthusiasts, hobbyists, and professional installers tackling medium-duty clamping tasks. If you need a reliable, readily available U-bolt that’s easy to work with and provides a strong hold on round objects, this National Hardware model delivers consistent performance.
Add the National Hardware 1/2 in. X 4 in. W X 6-1/2 in. L Coarse Zinc-Plated Steel U-Bolt to your toolkit and pair it with the right nuts and washers for a secure, durable mounting solution that lasts project after project.
