Recent Articles
- PACCAR Parts Launching New Electric Vehicle Charging Stations
- Maintaining the Integrity of Your Exhaust Aftertreatment System is Crucial
- WINTERIZATION SERVICE CHECKLIST
- TIPS FOR LIFE ON THE ROAD
- International Roadcheck
- Introducing Two NEW part numbers to the TRP® Aero Mirrors product line: MRKP01L & MRKP01R
- TRP® Windshield Glass
- We Are Here For You Now and in the Future.
- YOU ARE ESSENTIAL
- All-Makes All-March
- TRP® Extended Life Coolant
- TRP® Oil Coalescing Cartridges
- TRP® Chemicals
- TRP® U-Bolt Kits
- Know Your Torque Rods: Inspection and Replacement
- PACCAR Genuine Tips to Keep Your Battery in Top Condition
- TRP® Presents Tips to Maintain Your Battery Year-Round
- TRUST TRP® REMANUFACTURED BRAKES

TRP® U-Bolt Kits
For Commercial Truck, Bus, and Trailer Markets
Why Choose TRP® U-Bolts
At first glance, U-bolts might look similar. If the diameter, threads, and shape match, you might think that they are the same. That’s simply not true. Knowing a little about the technology and process used to manufacture U-bolts can help you understand the differences between TRP® top-quality U-bolts and other value brands.
What Do U-Bolts Do?
The primary purpose of a U-bolt is to provide the force necessary to clamp the suspension components together. These components include the top plate, axle, axle seat, leaf springs and bottom plate. In turn, this:
• Firmly clamps the leaf spring to the axle seat, preventing a shear of the centerbolt by reducing horizontal forces on it.
• Eliminates flexing of the leaf spring, which also reduces stress concentration near the hole for the centerbolt in each leaf.
• Provides the appropriate spring stiffness to maintain vehicle ride height specifications and improve handling characteristics.
TRP U-bolt kits are available in a wide variety of sizes to fit most truck, bus, and trailer applications. When replacing U-bolts, there are a number of specifications to consider, including diameter, grade, and configuration. TRP® U-bolt kits are available in the following:
Diameters
• Metric: M10-M32
• Inch: 7/16” - 11/4”
Grades
• Metric: Consolid 8.8, Consolid 9.8, and Consolid 10.9
• Consolid 8
Configurations
• Round, square, semi-round, flattened, or combinations
Materials
TRP® brand U-bolts employ several controls to ensure the best quality metals are used in the production of the hardware. They collaborate closely with the steel mills to ensure that the raw materials meet strict quality standards before being made into U-bolts. By closely controlling the raw materials, fewer flaws are found in the finished product.
Processes
Once the raw materials, or blanks, are delivered, TRP® U-bolts are manufactured under stringent quality controls designed to produce the best quality product. Because of the strict quality controls used during manufacturing, all TRP® U-bolts meet Society of Automotive Engineers (SAE) standards.
U-Bolt Grades
A U-bolt’s grade is a measure of how strong it is. The higher the grade, the stronger the U-bolt. Grades 5 and 8 are the most commonly used grades in U-bolts. Grade 8 U-bolts offer a 40% increase in yield strength when compared to Grade 5. Although Grade 5 might be applicable in some instances, if the grade of the original equipment U-bolt is not known, Grade 8 is always the safest choice. All TRP ® U-bolts are made of Grade 8 material.
Article Listing
Category
Maintenance
- Make an impression with TRP® Chrome-Plated and Stainless-Steel aftermarket truck parts
- TRP® Air Springs Keep You Comfortable on Any Terrain
- The Perfect Fit for Your Exhaust System
- Reduce Maintenance Costs with Bendix SmarTire™
- 5 AC Tips to Stay Cool this Summer
- Road Readiness
- ROUTINE MAINTENANCE WILL KEEP YOUR TRUCK PERFORMING AT PEAK EFFICIENCY
- International Roadcheck 2019
- We Are Here For You Now and in the Future.
- International Roadcheck
- Maintaining the Integrity of Your Exhaust Aftertreatment System is Crucial
Parts
- Drive Safe with Meritor® Medium-Duty Brakes
- Meet the Demands of Your Business With Bezares PTOs
- Choosing the Right Air Dryer Cartridge to Protect Your Brakes
- Get the Most Out of Your Fan Clutch With Horton’s DM Advantage®
- Reinforce Your Truck with Comfort and Control by Investing in PACCAR OE Shocks
- TRP: 20 Years of Quality and Value
- The Right Drum for the Right Application
- For Flexibility and Durability, Think TRP Exhaust Bellows
- TRP All-Makes All-March Event
- TRP Introduces Fan Clutch Repair Kits
- TRP Introduces All-Makes Super Heavy Duty AC Compressors
- TRP Announces New Warranty And Product Offerings For Performance-tested Air Springs
- TRP® Introduces New Lubricant Program
- TRP A/C Compressors Withstands the Most Demanding Applications
- TRUST TRP® REMANUFACTURED BRAKES
- TRP® Presents Tips to Maintain Your Battery Year-Round
- PACCAR Genuine Tips to Keep Your Battery in Top Condition
- Know Your Torque Rods: Inspection and Replacement
- TRP® U-Bolt Kits
- TRP® Chemicals
- TRP® Oil Coalescing Cartridges
- TRP® Extended Life Coolant
- All-Makes All-March
- TRP® Windshield Glass
- Introducing Two NEW part numbers to the TRP® Aero Mirrors product line: MRKP01L & MRKP01R
- TIPS FOR LIFE ON THE ROAD
- WINTERIZATION SERVICE CHECKLIST
- PACCAR Parts Launching New Electric Vehicle Charging Stations
Safety
- Control the Road Ahead With TRP® Tie Rod Ends
- Tips for Safe Driving at Night
- Get a Sharper View with Kenworth T680 Mirrors
- 4 Tips to Start Spring with Safety
- Spring Bus Maintenance: 5 Systems You Should Check Right Now
- CVSA Roadcheck 2016
- Put Brake Safety on the Top of Your List
- Spring Safety Tips 2017
- CVSA Roadcheck Readiness
- YOU ARE ESSENTIAL