Industrial U-Bolts Suppliers
41 vetted U.S. suppliers · 22 states
Industrial U-bolts — for pipe-rack hangers, exhaust clamps, automotive suspension, and structural restraints — are sourced from a specific set of bent-fastener manufacturers, not your local hardware store. Below is our live count of vetted U.S. suppliers, with one-click RFQs to multiple at once.
Geographic distribution
Where these suppliers are
Top 8 states by vetted-supplier density. 14 more across 14 additional states — listed below the chart.
Also covered
Tennessee (1) · New Jersey (1) · Oregon (1) · Minnesota (1) · Georgia (1) · Massachusetts (1) · Nebraska (1) · Kansas (1) · Utah (1) · Indiana (1) · Rhode Island (1) · Hawaii (1) · Wisconsin (1) · Arizona (1)
See the list
Want to see all 41 suppliers?
Run the search and we'll show you who they are. Send branded RFQs to as many as you want in a single email — your search is pre-loaded.
What industrial U-bolts are
U-bolts are bent threaded rod in a U-shape with two ends threaded for nuts and washers — used to clamp around pipes, cables, structural sections, and tubes. Common materials: carbon steel (zinc-plated or hot-dip galvanized), 304/316 stainless. Bend types: square (90° corners) for structural-tube clamping, round (curved bend) for pipe and conduit, semi-round for muffler and exhaust work. Sizing is by inside dimension (ID), thread diameter, and leg length.
What to look for in a supplier
Match the bend to the application: square U-bolts for square tubing and structural sections, round U-bolts for round pipe and cable, semi-round for exhaust and muffler clamps. Material: carbon-steel zinc-plated for indoor/protected use, hot-dip galvanized for outdoor/buried, stainless for marine/chemical. Size matters: confirm whether you're spec'ing by tube/pipe OD, ID of the U-bolt loop, or thread diameter — these differ. Most suppliers carry standard sizes (¼" through 1" thread, common pipe sizes); custom bends with non-standard ID, leg length, or material are available at premium with longer lead time.
FAQ
Common questions
What's the difference between a square and round U-bolt?
Square U-bolts have 90° corners with straight legs — used to clamp square tubing, beams, and structural sections. Round U-bolts have a continuous curved bend — used for round pipe, conduit, and cable. Semi-round is the third common type — designed specifically for exhaust and muffler clamping where the U conforms to the outside of a round tube.
How are U-bolts sized?
Three dimensions matter: thread diameter (the bolt diameter — typical sizes ¼", 5⁄16", ⅜", ½", ⅝", ¾", 1"), inside dimension (the loop ID — must match the OD of what you're clamping plus clearance), and thread length (leg length above the bend — must accommodate the part being clamped plus nut and washer). All three need to be on the PO.
What finish should I spec for outdoor U-bolts?
Hot-dip galvanized (HDG) is the standard for outdoor and buried use — thick zinc coating, decades of corrosion protection. Mechanically galvanized is a thinner alternative with slightly lower corrosion resistance but tighter dimensional fit. For marine or chemical exposure, 316 stainless is the right call.
Can U-bolts be custom-made?
Yes — most U-bolt manufacturers will quote custom bends with non-standard ID, leg length, thread, or material. Lead time is typically 2-4 weeks beyond standard stock, and minimum order quantities apply (often 100+ pieces for custom bends).
Ready to see the suppliers?
41 vetted U.S. suppliers waiting in your search.