Let’s cut to it: if what you’re clamping needs to stay put, your U‑bolt better hold up—especially if it’s outdoors, exposed to salt air, or standing in a chemical bath. Marsh Fasteners’ stainless steel U‑bolts do just that. Built in either reliable 304 stainless or the tougher 316 stainless, they resist corrosion and keep their grip under pressure. Whether it’s securing plumbing, mounting marine hardware, or supporting structural beams, these U‑bolts deliver. We offer both metric and imperial options—from small M6 sizes for precision builds to massive 12‑inch pipe clamps that handle serious loads. Plus, every U‑bolt includes the necessary nuts and plates—because nobody needs five part numbers for one proper clamp.
Our Range of Stainless Steel U‑Bolts Includes
Our stainless steel U‑bolts cover every application, from precision assemblies to large structural supports. Each type is built for dependable grip and corrosion resistance. Whether you’re securing a small conduit or a heavy pipe system, you’ll find the right size and strength here—complete with matched plates and nuts for a ready‑to‑install fit.
Metric Stainless U‑Bolts (M6, M8, M10, and up)
Small-scale doesn’t mean weak. These metric U‑bolts are perfect for machinery, robotics, conduits, and automation systems. The included plate and nuts are precision‑matched, making your assembly smoother and more reliable.
Imperial‑Size U‑Bolts (Standard Round Bend, 18‑8 / 304 SS)
The workhorse of the U‑bolt world. Use these on pipes, struts, and general structural tasks. Coarse threads and standard dimensions make them easy to spec and pair.
Oversized Pipe U‑Bolts (e.g., 12″ OD, 7/8″ Rod)
When “standard” is too small, these giants step in. Designed for large-diameter piping, structural supports, or reinforcement systems.
Technical Specifications (Because Specs Matter)
Here’s the meat for engineers and buyers who want the data upfront:
| Specification | Details |
|---|---|
| Dimensions | Metric: M6–M10 (~1.25–3″ thread); Imperial: 3/8″‑16, 2½″ width, 3⅝″ length |
| Materials | 304 (18‑8) Stainless Steel (general); 316 Stainless Steel (marine/chemical) |
| Pipe/Tubing Support | From small tubing (metric U‑bolts) to 12″ pipe OD (oversized) |
| Load Capacity | Up to ~7,540 lbs in heavy‑duty models |
| Torque / Clamping | Use K‑factor calculation; lubricated threads give consistent load support |
Benefits of Stainless Steel U‑Bolts
Choosing the Right U‑Bolt
Follow these tips to make sure you pick the right U-bolt:
1. Pick the Right Material
2. Match the Size Correctly
3. Load Capacity & Proper Torque
4. Check Included Accessories
Why Choose Marsh Fasteners?
We’re not a generic catalog. We’re fastener experts.
What Our Customers Say
These guys always have what I’m looking for in stock. I got tired of going to Home Depot to in search of the fasteners I needed for a project only to find out that either they didn’t stock that size, they were out of them or they only had packages of one or two of that particular fastener. Not to mention spend 15 minutes sorting through various packages put back in the wrong place. I’m always building or repairing things and some of the fasteners I need are a weird size. Marsh Fasteners always has them in stock, their staff is polite, and their prices are fair.
I love marsh fasteners!! Kathy and her grandson are the nicest people you will ever meet!! Kathy and Chris were my old bosses. Kathy is the best.
This is a great company to buy stainless steel fasteners from. Fast service, quality products, and competitive pricing. Don’t waste your time at the Big Orange or Big Blue box stores.
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