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  1. Trailer Leaf Spring Suspension
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  3. Suspension Bolts
  4. Axle Mounting Hardware
  5. 3 Inch Long
  6. 9/16 Inch Diameter
Step Bolt For Double Eye Springs - 9/16" Diameter - Plain - 3" Long

Step Bolt For Double Eye Springs - 9/16" Diameter - Plain - 3" Long

Item # ABS34FR
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Trailer Leaf Spring Suspension
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ABS Fasteners Trailer Leaf Spring Suspension - ABS34FR
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9/16" Diameter step bolt has a 7/16" thread diameter and is used to mount a double-eye spring inside a front or rear hanger on your trailer's leaf spring suspension. Locknut sold separately. Lowest Prices for the best trailer leaf spring suspension from ABS Fasteners. Step Bolt For Double Eye Springs - 9/16" Diameter - Plain - 3" Long part number ABS34FR can be ordered online at or call 1-833-496-1390 for expert service.
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ABS Fasteners Trailer Leaf Spring Suspension - ABS34FR

  • Suspension Bolts
  • Axle Mounting Hardware
  • 3 Inch Long
  • 9/16 Inch Diameter
  • ABS Fasteners

9/16" Diameter step bolt has a 7/16" thread diameter and is used to mount a double-eye spring inside a front or rear hanger on your trailer's leaf spring suspension. Locknut sold separately.


  • Suspension bolt attaches leaf spring to front or rear hanger
    • Works with locknut (sold separately)


  • Bolt length:
    • 3" Long under the head
    • 2-5/16" Usable
  • Diameter: 9/16"
  • Thread size: 7/16"-20
  • Head diameter: 13/16"
  • Grade 5
  • Quantity: 1 step bolt

Dimensions of bolt

43F300BSH5M/P369 Trailer Suspension Bolt - 7/16" Thread Diameter - Plain

Video of Step Bolt For Double Eye Springs - 9/16" Diameter - Plain - 3" Long

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for ABS Double Eye Springs Step Bolt Installation - 5th Wheel

Hi there, trailer owners. Today, we're gonna be taking a look at a replacement step bolt, in a 9/16" diameter for a 1 3/4-inch spring eye hanger. These are also known as shackle bolts. So, here we've got our old spring, and our new spring. And if we look at our old spring, you'll see, it's got a bunch of grease around the edges here. And if we look at the bushings inside of our old spring, we can see that the bushing is all worn out.

It's actually got a pretty big chunk missing out of it there. Now, when this happens, in most cases, you can drive those bushings out and you can replace them. But if a bushing just falls through, the spring needs to be replaced. We're gonna be upgrading to a new leaf spring on our trailer here. And if we look at the bushings on this one, it's a nice pre-installed bushing in there.

But the bushing that's in here is a self-lubricating bushing. You can see, it's made of a, kind of a plastic-style-type of bushing, versus the old ones we had that we're lubricated. Those are bronze bushings. So, when we go to put our new spring in, when we go to reuse our bolts, the bolts that we're previously in there we're wet bolts. And these are used, so you can inject grease in there to lubricate between the bolt and the bushings.

So that way, everything stays free. And that works out really well for extending the life of your bushings by putting them grease, but you can see that they do still wear out. When you go to put in a different type of bushing that is self-lubricating, you don't wanna have any grease in there. The grease can actually deteriorate the bushing and cause it to wear out prematurely. So we don't want to use these old wet bolts 'cause they do have some grease in there, and they also have the potential, if somebody goes, "oh, Hey, there's a grease fitting, let me grease it." And then they ended up greasing it, and then we've got an issue down the road.

So let's just take care of that issue. And we're just going to replace it with a regular step bolt. This one is designed to work with the one and three-quarter inch double spring eye. This is just a single spring eye because of the type of suspension system we're putting on it here. But this is the correct size of bolt to get it installed. And you can see here that this is just a standard bolt. It doesn't have a sort of fitting, so this is designed to work with this type of bushing here. And it's going to prevent anybody from accidentally greasing that in the future. So we can go ahead and show you how to get these installed. Now they're really easy to install once you've got your old ones out of there. It is just a bolt that you get. So this nut here is actually the nut from the wet bolt, but it's the same thread pattern. If you need new nuts, you can get those also here at etrailer. So here's our bolt. You can see it's got a cerated flange on it there to keep it from rotating in the hanger. We've got our shoulder here, where it sits inside of our bushing. And the measurement of this bolt. This is a three-inch bolt, and that's from the bottom of the head there to the end of the threads. That's going to give us plenty of usable portion here for our spring's bushing to ride on. And we've got plenty of threads sticking out to properly secure our bolt. It's a 9/16" diameter shoulder. So to get it installed, we're just going to lift our spring into position. We're going to take the spring eye, and line it up in between our hanger. We'll then take our step bolt here. And we're just going to slide it on through there. Now it's not uncommon for it to be a little stiff. So we're just going to take a hammer, and just going to tap it the rest of the way. And we're not even hitting it that hard. It's kind of using it the way with the hammer. To tap it on in there. And then we'll secure it with a nut on the other side. We can now tighten down that nut. It is going to draw the bolt in some on the cerated edge, but we don't want to over-tighten our bolts. So after we put some pressure on it, we can then come back with our hammer, and tap it in the rest of the way. We'll then tighten down the nut. The nut that we've had on here is going to be an eighteen millimeter socket, and the head of the bolt will hold with a twenty-one millimeter wrench. So we just drawn that in. And then there's still a little bit of a gap there. So we're going to take our hammer. And just take a look at it there, it's nice and flat. So it's all the way driven in. Then we'll finish tightening it down. And then we can go back and torque it to the manufacturer specifications. So now that we've got this one installed here, if you had a traditional leaf spring with a double eye, you would just repeat that process for the one on the other side. We're installing a slipper box here, so we don't have an eye leaf over here. So we're just going to continue on with this installation. If you like the way our slipper set up is, or if you're interested about these, you can find out more about them here at etrailer. And that completes our look at the 9/16 step bolt for a 1 3/4 inch spring eye hanger..

Customer Reviews

Step Bolt For Double Eye Springs - 9/16" Diameter - Plain - 3" Long - ABS34FR

Average Customer Rating:  4.5 out of 5 stars   (17 Customer Reviews)

9/16" Diameter step bolt has a 7/16" thread diameter and is used to mount a double-eye spring inside a front or rear hanger on your trailer's leaf spring suspension. Locknut sold separately.


Has anyone EVER replaced these bolts with out a new locknut??, probably NOT. Either supply the nut with the bolts or give the part number for the locknuts right next to the bolts. I looked for a half hour on your website and using your search engine and never found them.

We have the lock nut part # 1137306
Fastenal Lock Nut - Zinc Plated Steel - 7/16"-20 - Qty 1
listed as a related part on the product page.
-- Etrailer Expert Jenny N - 06/27/2022


Satisfied with the product & delivery, and good customer service from etrailer throughout the years.


I really can't give a fair avaluation , because this part was not used in the final assmy,
Another bolt was required.


built was exactly as described fit pref ect


As advertised. Have 4000 rough miles on them, no sign of a problem.


Your sales rep was very helpful by giving me all the info I needed to get the parts I needed for me repair job. Just wish you had all the parts in stock.













See what our Experts say about this ABS Fasteners Trailer Leaf Spring Suspension

  • Correct Nut to Use For Step Bolt For Double Eye Springs ABS34FR
    You will need a lock nut, though the ones you mentioned are not, we do have the correct lock nut for the Step Bolt For Double Eye Springs - 9/16" Diameter - Plain - 3" Long # ABS34FR: - Fastenal Lock Nut - Zinc Plated Steel - 7/16"-20 # 1137306
    view full answer...
  • Hardware Needed With the Road Armor Equalizer Kit
    When using the Road Armor Shock Absorbing Equalizer Kit # LC696740, for bolts you want ten 9/16" suspension bolts part # ABS34FR and 8 shackle straps per axle. The kit you are talking about which is part # LC64FR has the correct parts from Lippert, but not enough of them. The correct shackle straps also depends on your trailer. If you let me know what length your shackle strap is I can recommend those too. The most common size for the type of trailer you have is a 2-5/8 inch shackle strap...
    view full answer...

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Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Jacob T
Video Edited:
Jacob T
Employee Wilson B
Updated by:
Wilson B
Employee Jonathan Y
Video by:
Jonathan Y
Employee David F
Test Fit:
David F
Employee Mike S
Written by:
Mike S
Employee Michael B
Installed by:
Michael B

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