Max Warehouse

33169 1161 NW 159th Drive US FL

Phone: (800)210-0132

Need a secure way to clamp pipe, conduit, or hardware to beams, posts, and trailers? Choosing the right U-bolt size, finish, and thread saves time and keeps your project rock solid. At Max Warehouse, you’ll find dependable U-bolts in the specs you need, with fast delivery and easy support. Explore our full range in the Fasteners category to complete your setup with nuts, washers, and more.

U-Bolts: What Features and Specs Should You Compare?

Match material and dimensions to the job. Zinc-plated steel U-bolts handle general indoor/outdoor use and resist corrosion. Stainless steel delivers extra protection in wet, coastal, or chemical environments. Common diameters include 1/4 in., 5/16 in., and 3/8 in., with widths from 3/4 in. up to 3-1/2 in. and a variety of leg lengths to fit pipe, rod, and channel.

• Coarse thread for fast assembly and reliable grip
• Round and square-bend options to match pipe or square tubing
• Individual pieces and value packs for small jobs or bulk installs
• Trusted brand options like Hampton in zinc-plated and stainless steel

Featured picks to simplify your choice:

- Hampton 5/16 in. x 2 in. W x 3-3/4 in. L Coarse Zinc-Plated Steel U-Bolt (Pack of 10) – A go-to size for strapping pipe and hardware to flat surfaces.

- Hampton 5/16 in. x 2-1/2 in. W x 5-3/16 in. L Coarse Stainless Steel U-Bolt (Pack of 5) – Ideal when corrosion resistance is a must.

- Hampton 3/8 in. x 3 in. W x 7 in. L Coarse Zinc-Plated Steel Square Bend U Bolt (Pack of 10) – Square-bend stability for channel and rectangular tubing.

Square U-Bolts: When Is a Square Bend the Better Choice?

Choose square-bend U-bolts when you’re fastening to flat or square profiles—unistrut, channel, angle iron, or ladder racks. The flat bearing surface helps distribute load and reduce movement on edges. For heavier assemblies, step up to 3/8 in. diameter for added strength and thread engagement. Confirm three key dimensions before you buy: inside width (fits around the member), leg length (clears material and hardware), and thread length (enough for washers and nuts). If you’re anchoring hardware to masonry or concrete as part of the install, pair your hardware plan with the right anchors for a dependable, code-friendly hold.

U-Bolt Installation: What Pro Tips Ensure a Lasting, Rattle-Free Clamp?

• Measure inside width against your pipe OD or tubing dimension for a snug but not crushing fit.
• Verify leg length and thread length to accommodate mounting plates, washers, and spring lock hardware if used.
• Tighten evenly, alternating between nuts to seat the U-bolt squarely. Avoid over-torque that can deform pipe or crush insulation.
• For stainless fasteners, a dab of anti-seize on threads helps prevent galling.
• Inspect after first use; retighten if the assembly settles under load or vibration.

Building rigging or lift points? Complement your setup with purpose-built eyebolts sized to your application.

Why buy U-bolts here? You get selection, speed, and support—backed by 200K+ SKUs across 14 nationwide warehouses, a helpful bilingual team, and inventory that’s ready when you are. Enjoy discounts on a wide range of products, watch for seasonal promos, and bundle accessories for the best value. Enjoy fast, reliable and free shipping on orders over $99!*

Ready to lock it down? Choose the right U-bolts today and get them delivered quickly so you can finish your build with confidence. Order now and keep every connection tight, true, and built to last.

*Restrictions may apply