U-Bolts

Step 1: Type of Bend

The typical U-bolt is rounded just like the letter "U". Yet there are a number of different of U-bolt types. The three primary types of bends are round, square and semi-round. Your vehicle's leaf spring suspension style and the shape of its parts will determine which type of bend is necessary. We do stock other types of u-bolts like Forged Bend, but they are not as common.

Step 2: Rod Diameter

After you determine the bend you need, measure the rod diameter (A). The diameter can easily be measured with a wrench.

The socket sizes below will help to determine your rod size.

• 11/16 socket = 7/16” diameter rod
• 3/4 socket = 1/2” diameter rod
• 13/16, 7/8 or 22mm socket = 9/16” diameter rod
• 15/16 socket = 5/8” diameter rod
• 1-1/16 or 1-1/8 socket = 3/4” diameter rod
• 1-5/16 socket = 7/8” diameter rod

Step 3: Length and Width

Measure the inside width (B) and the length (C) of the U-bolt legs as well. With this information in-hand, you will be well on your way to a quick and easy U-bolt installation.

You are not alone if you haven't heard of a leaf spring U-bolt. Most people have no idea what type of function this little part plays in the average truck's operation. Truck U-bolts are used within vehicle suspension to connect leaf springs. They offer the force necessary to clamp the leaf spring along with its related components to one another, providing a lasting attachment to the axle.

When installed correctly, U-Bolts help eliminate spring flexing and allow a vehicle to maintain its ride height and handling. A firm connection between the leaf spring and the axle seat offsets the horizontal pressure on the center bolt. If this connection is loose, the increased horizontal pressure can cause the center bolt to break, leading to leaf spring failure.

Tight U-bolts help prevent broken leaf springs. For more information, read this article on broken leaf springs and what causes leaf springs to fail. You can do your truck an enormous favor by having your leaf spring U-bolts inspected during your next service maintenance appointment.