U-Bolt Information
U-Bolt Specifications and Information at Dsuban Spring Service and Dsuban.com.
⚠️ Important Notes Before Ordering
Design & Fitment
- Square and Semi -Round U-Bolts Have Slightly Rounded Corners: Built with rounded interior corners rather than a perfect square to maximize metal strength. You can Click Here to View a Sample Photo to see the exact shape.
- Primary Use: Engineered strictly for high-stress applications like suspension, leaf springs, and body mounting.
- Spring-Back Effect: Small diameters (especially 1/2″ or smaller) may measure slightly wider due to natural steel tension.
- Self-Conforming Fit: Proper torquing safely forces the rod to conform tightly around your mounting item.
- Industrial Utility Only: Formulated strictly for heavy clamping and torque loads, not for decorative or ornamental uses.
- Sizing & Fit: They are designed to match the exact width of the object they fit over (e.g., a 3-inch object requires a 3-inch U-bolt). Smaller U-Bolt diameters (1/2″ or less) may spring slightly wider naturally, but will conform to the correct shape once torqued.
Technical Specifications
- Common Shapes: The most popular shapes available are Square Top, Semi-Round Top, and Round Top.
- Manufacturing Process: They are cold-bent on a hydraulic bender to maintain metal grain orientation for maximum strength.
- Fine Threads Only: Manufactured exclusively with standard SAE fine thread pitches.
- Die-Rolled Threads: Built by rolling raw rods between mechanical dies to preserve grain structure and load capacity, and are not possible to thread further.
- Reduced Stock Diameter: Thread rolling causes the unthreaded upper legs to measure slightly smaller than the thread outer diameter.
- Fixed Thread Lengths: Rods cannot be threaded further up the legs than what is explained on each U-Bolt page “Calculating Approximate Thread Length”.
- Raw Oiled Steel Finish: Shipped as bare material with no exterior coatings, platings, or anti-corrosion finishes available.
Physical Properties:
- 150,000 PSI Minimum Tensile Strength; 130,000 PSI Minimum Yield Strength; 120,000 PSI Proof Load; 35% Reduction of Area; 10% Elongation. U-Bolts produced to SAE-J429 specification. This material is a cold drawn, stress relieved, micro-alloyed, 1541 modified steel. This steel cannot be welded on due to the orientation of the grain of the steel.
- Grade: U-bolts from 3/8 to 9/16 diameter are Grade 5, while 5/8 to 1-1/4 diameter are Grade 8.
Return Policies
- All Sales Final: Every order is custom-bent to your dimensions and cannot be returned or exchanged.
- Customer Support: Call our service desk directly at (513) 860-1200 with any dimension or application questions before submitting your order.
U-Bolt Diameters:
We only stock and sell the following diameters of rod;
- 3/8 (24 threads per inch, SAE)
- 7/16 (20 threads per inch, SAE)
- 1/2 (20 threads per inch, SAE)
- 9/16 (18 threads per inch, SAE)
- 5/8 (18 threads per inch, SAE)
- 3/4 (16 threads per inch, SAE)
- 7/8 (14 threads per inch, SAE)
- 1 (14 threads per inch, SAE)
- 1-1/8 (12 threads per inch, SAE)
- 1-1/4 (12 threads per inch, SAE)
-
Calculating U-bolt Size:
- Note that the “L” measurement (length) is not exact depending on total rod length, consequently the “L” measurement may be slightly shorter or longer. We add “C” and “L x 2” measurements to get the total material length which is made in even lengths, 22, 28, 38 etc.
(Example: 4″ wide U-bolt with 5″ legs will be made out of a 14″ rod, resulting in an actual leg length of approximately 4 3/4″.)
Calculating Approximate Thread Length:
- Approximate Thread Length is calculated by multiplying 2 X “L” plus “C” (which equals the overall length of rod material before bending)
- If your thread length is a critical measurement, please call us to confirm before ordering.
- Thread lengths are predetermined by our threaded rod manufacturer and are listed below and cannot be altered without a special order.
| Total Rod Material Length | Approximate Thread Length (On Each Leg) |
|---|---|
| 8″ to 20″ | 2″ – 3″ |
| 22″ to 30″ | 3″ – 4″ |
| 32″ to 48″ | 4″ – 6″ |
Available U-bolt Bending Inside Widths (in inches);
- Round
- 1-1/2
- 1-3/4
- 2
- 2-1/4
- 2-1/2
- 2-3/4
- 3
- 3-1/8
- 3-1/4
- 3-3/8
- 3-1/2
- 4
- 4-1/2
- 5
- 5-1/2
- 6
- Square
- 1-1/2
- 1-3/4
- 2
- 2-1/4
- 2-1/2
- 3
- 3-1/4
- 3-1/2
- 4
- 5
- 5-1/4 (Special for Freightliner with rounded corners)
- 5-1/2
- 5-1/2 (Special for some applications with 1” rounded corners)
- 6
- Semi-Round
- 3
- 3 (For Special Ford applications)
- 3 (For Special GM applications)
- 3-1/4
- 3-1/4 (Special for some applications with .500” rounded corners)
- 3-1/2
- 4 (For Special Peterbilt applications)
- 4 (For Special Navistar applications)
- 4 (For Special Ford applications)
Note:
Extreme lengths (short/long) and bending widths cannot be ordered on our web site. If the size or bend style you need is not listed here or on the detail pages, call us at 513-860-1200.