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9/16" Diameter spring-retainer bolt is used to mount double-eye spring in front or rear suspension hanger. Locknut included.
Features:
Specs:
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hello everybody, this is Jeff at etrailer.com. Today we're gonna take a look at the three inch long, 9/16 diameter Zinc Shackle Bolt with the locknut for your trailer leaf springs. Now, this 9/16 diameter shackle bolt is used to mount your leaf spring to your trailer's front or rear suspension hanger, and this part will include the locknut that secures the bolt to the hanger. Both these parts are a corrosion resistant zinc finish. This is for a quantity of one bolt and one locknut. Now, few dimensions, we'll start with the bolt itself, we mentioned the diameter on this, it's gonna be right at 9/16 of an inch.
The bolt head size or the socket size you would use on this, it's gonna be 13/16 of an inch. Now, the length under the bolt head to the very end of the bolt is gonna be right at three inches, the usable length, which would be from under the bolt head to where the thread starts, is 2 3/8 inches, and just the thread length is about 5/8 of an inch. Now, the thread size on this is 9/16 by 18 threads per inch, and the lock nut, which will install right on here, when you go to install it, that's gonna have a diameter or head size of 7/8 of an inch. But that should do it for the review on this three inch long, 9/16 diameter Zinc Shackle Bolt with the locknut for your trailer leaf springs.
Excellant and fast delivery
fast, prompt delevery. Items received were exactly as described.
Great fit. Pay attention to crimp marks on nut, as this seems to act as the locking feature. Hopefully the small extra expense for zinc coating with a little paint holds up.
Good product
Delivered fast
Got a free shipping, that is fantastic
Thanks
I got my shackle straps and bolts fast and at a great price. Installation was fast and easy. I'll check etrailer first for all
of my trailer needs.
They have the stuff & fast shipping!!
All parts fit my rebuild of new springs for my 1999 Bear trailer that my G3 Bassboat sat on for 26 yrs(used a lot for fishing on weekends)
Worked perfect for my application.
Worked great for installing leaf spring s.
Direct replacement, good quality
Ideally, the shoulder of the bolts should be long enough to extend all the way through the spring and shackle so that the threads are not subject to load or moving parts. The treads are the weakest portion of any bolt and should only be exposed to tension, not sheer loads. This being trailer hardware, I guess that design factor is not a high priority. Just seems like it could be done right with just a smidge more effort or consideration. That said, the original bolts I removed had only a slightly longer shoulder and one-half the shackle was riding on threads and it held up for years, although it was worn considerably more in the threads.
Good price and they fit perfectly.
Ronald 
2/12/2025
Been on the trailer for a year. Working great. ??
Jerred H.
2/12/2025
Better than original
I am okay with these, but I do wish I could find rust resistant spring bolts.
works as needed
I don't write many reviews--usually only when something is really bad or really good. I have been rebuilding a trailer and this is only my second order from etrailer.com. Their service is unmatched by any company I have dealt with in a long time. I will continue to do business with them.
Wth rusted out leaf springs on my trailer but with zero experience replacing them, I contacted etrailer and Shawn was very helpful in selecting the right parts and taking me through the process. She was patient in terms of helping me take the right measurements and suggesting the bolts and pieces I needed to do the job right.
Everything came well packaged and complete two days later. An hour after that the springs were in my trailer and now has a boat sitting on it.
Thanks!
worked perfectly
New bolts made replacement of springs e asy
we plan on doing more business our trailer seem to be a hit see attached photo
As described
It was great. Couldn't find anywhere el se
I am completely satisfied with service and the product that I purchased from etrailer.com. The measurements and specifications on the web site were complete and accurate. Shipping was prompt and the parts were packed more carefully than anything that I have purchased online. Installation of my replacement leaf springs went seamlessly which I really appreciated as I had to leave my broken trailer at my hunt camp and had limited tools to do the repair.
I can't recommend etrailer.com highly enough. They are now my first choice in trailer parts.
I never saw locknuts like the ones that came with the bolts. They are only slightly dented on the exterior/last thread of the nut. Looks home made..lol . Bottom line if the bolt is just big enough to fit the lock nut most likely will not fair well. I punched the bolt threads as a assurance.
Robert H.
10/21/2014
After a year in use and 3,000 miles of high speed interstate and heavy load everything is GREAT.
Info for this part was:
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Gwendolyn Y.
2/12/2025
The rebuild is looking awesome, Jerry. What is your go to spot for fishing weekends?