Selecting Correct 9/16-Inch Step Shackle Bolt and Nut  

The Dexter Single Axle Heavy Duty Suspension Kit #K71-403-00 technically will not have a torque specification. However, I have been asked this before and was informed by Dexter that what you need to do is tighten them down to the point of either…

All of the components of the Dexter Single Axle Heavy Duty Suspension Kit #K71-403-00 are zinc plated which is great for marine applications.

If you are using 9/16 inch shackle bolts which are the most common you will want 65 to 95 foot pounds of torque. If you are using 1/2 inch then go for 45 to 70 foot pounds. And for 5/8 inch bolts use 100 to 120 foot pounds. All of these components…

The Dexter Single Axle Heavy Duty Suspension Kit #K71-403-00 uses the Shackle Bolt #007-126-01. The 9/16" portion of this bolt is 2-1/4" long.

The bolts in the Dexter Single Axle Heavy Duty Suspension Kit #K71-403-00 are 9/16" diameter like you need. This kit is designed for and will work with your 1-3/4" wide, double eye leaf springs. I have added a link to a video review for you…

Wet bolts like the part #126B2 aren't as important to be used if the bushings are nylon but if you wanted to use them you certainly can.

In order to retain the same suspension geometry, when you replace shackles you should use the same length replacements. Going with a shackle that is too short will not allow enough articulation in the suspension, and cause a very rough ride. Using a…

The threaded portion of the bolts of the #K71-403-00 are 7/16 inch but the stepped up diameter is 9/16 inch. The shackle length is 3-1/8 inch from hole center to hole center. The bolt length is 2-7/8 inches. We can't help much with the axle…

If you look at the photo I have edited for you, you can see all the relevant dimensions of the #115052 leaf spring shackle.

You will need 2 of the Heavy Duty Suspension Kits #K71-403-00 for your tandem axle RV. If you also need to replace the equalizer bolts you will need 2 Bolts #007-126-01 and Nuts #006-092-01. We do have Nylon Bushings #TRBU11566 if your current…

We have leaf spring bolts that were made specifically with features for the leaf spring application like the part #126B2. This is the correct size has a knurled section right below the head of the bolt which helps with install and has a grease…

Trailer manufacturers don't usually keep a record of parts like these that they install at the factory, so I cannot be sure as to the exact length of the shackle strap that would have come originally on your trailer. With this in mind, a 3-1/8…