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The right bolt keeps your double-eye spring working the way it should. This 1/2" diameter shackle bolt gives your spring a solid connection point inside the front or rear hanger. It’s built to handle the daily flex and movement of a leaf spring suspension without backing off or wearing out too fast.
Getting the right fit matters for both ride quality and durability. This bolt measures 3" long under the head, with a usable length of 2-1/4". The 1/2"-20 thread size matches standard locknuts like the ABS44FR (sold separately), so everything tightens down cleanly and stays put through bumps and turns.
A suspension bolt takes real stress every mile. This one’s made to last with Grade 5 steel strength, giving you solid holding power and consistent performance. It’s the kind of dependable fastener you use once and trust for the long haul.
When old hardware rusts or stretches, this shackle bolt drops right in as a direct replacement. It restores a snug, secure connection between the spring and hanger so your suspension tracks straight and quiet.

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Jeff: Hello, everybody. This is Jeff at etrailer.com. Today we're going to take a look at this 1/2" diameter shackle bolt for double-eye springs. Now this 1/2" diameter shackle bolt is used to mount a double-eye leaf spring to your front or rear hanger that's on your trailer suspension. It is designed to work with a 1/2" by 20 size lock nut, which we do sell separately on our website. And it's usually listed on this product page as a related product.
And it is part number ABS44FR.Now this is for quantity of one shackle bolt. Give you a few dimensions on this. The length of the bolt, which is always measured from underneath the hex head to the very end of the bolt, you'd be looking at 3". The diameter we mentioned is 1/2" diameter. The threads on the end here they are 20 threads per inch.
And the hex head size, it uses a 3/4" socket. I happened to pull one just to show you how it fits in there perfectly.And the last thing is the rating on this as a grade five rating bolt. And the way you can tell that is if you look at the head, on top of the head, you'll see three straight lines on it. That indicates that it has a grade five rating to it. But that should do it for the review on the 1/2" diameter shackle bolt for double-eye springs..
Ratings & Reviews

Mike L.
9/13/2026
We do mention in the product description that the # TRFA916DLNZ nuts aren't included.

Joel
3/16/2025
Still working very well.


Jenny N.
12/29/2023
If you can use one that is three inches long then we do have one that comes with the locknut. It is part # ABS74FR.

Brooke M.
3/26/2025
Glad to hear that, James! Hopefully with the new bolts, you'll be in good repair for a long while :)

Philippe
1/26/2024
Held up in fact upgraded outboard to a heavier and trailer still rides beautifully, good product
Info for this part was:
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Katrina D.
3/21/2024
It looks like the tracking is showing that the order arrived. Have you actually received your order?