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Shackle Bolt with Locknut for Double-Eye Springs - 3" Long

Shackle Bolt with Locknut for Double-Eye Springs - 3" Long

Item # 166081
Our Price: $7.42
Trailer Leaf Spring Suspension
Shipping Weight: 0.31 lbs
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ABS Fasteners Suspension Bolts - 166081
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9/16" Diameter spring-retainer bolt is used to mount double-eye spring inside front or rear hanger. Includes locknut. Great Prices for the best trailer leaf spring suspension from ABS Fasteners. Shackle Bolt with Locknut for Double-Eye Springs - 3" Long part number 166081 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (767)
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ABS Fasteners Trailer Leaf Spring Suspension - 166081

  • Suspension Bolts
  • Camper
  • Car Hauler
  • Utility Trailer
  • 3 Inch Long
  • 9/16 Inch Diameter
  • ABS Fasteners

9/16" Diameter spring-retainer bolt is used to mount double-eye spring inside front or rear hanger. Includes locknut.


Features:

  • Suspension bolt attaches leaf spring to front or rear hanger
  • Included locknut secures in place on bolt


Specs:

  • Diameter: 9/16"
  • Length: 3"


166081 Shackle Bolt with Nut





Video of Shackle Bolt with Locknut for Double-Eye Springs - 3" Long

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




Video Transcript for Redline Trailer Suspension 166081 Review

Today we're going to take a look at the 3-inch-long shackle bolt with the lock nut for double-eyed springs. This bolt will secure leaf springs to your front or rear hangar of your trailer's suspension system. Does include this lock nut to secure the bolt into place. Now the bolt itself is a grade-5 bolt. The overall length on this bolt if we measure it from the bottom of the head to the very end and see is going to be right at 3 inches. The bolt size is a 9/16th diameter by 18 threads per inch. The bolt head size is 13/16ths of an inch.

I got example here's a socket. You can see it will fit the head perfectly and then the lock nut which goes on the end right, the size on that is 7/8ths of an inch. You can see it fit rights into a 7/8ths inch socket but that should do it for the review on the 3-inch-long shackle bolt with the lock nut for the double-eyed springs.

Customer Satisfaction Score:


Customer Reviews

Shackle Bolt with Locknut for Double-Eye Springs - 3" Long - 166081

Average Customer Rating:  4.8 out of 5 stars   (765 Customer Reviews)

9/16" Diameter spring-retainer bolt is used to mount double-eye spring inside front or rear hanger. Includes locknut.

by:

Your shipping time went wrong, but Kelsey’s way of handling
My order with problems, made my respect level go up.
Also, on your website, you have a picture of equalizers that look American made, with your name on it. What I received was stamped China and looks cheap…..



by:

These are the exact bolts used by the manufacturer of my trailer. I had a spring break after 10yrs use, so am replacing the springs and all the bolts at the same time, thank you to etrailer for the springs (ordered earlier) and now the bolts/nuts, all arrived quickly and accurately, you are my first choice for all trailer parts for my 7 trailers, thank you and keep up the good work!



by:

I payed to have items delivered on Friday and they weren't delivered until Monday, I was told that extra charge would be reimbursed to my cc, waiting to see if that happens. All products were excellent though. Will do business with etrailer.com again.



by:

When I ordered my kit from etrailer to replace the double-eye leaf springs on my 1970 Shasta Trailer, I decided to save a few bucks and get the bolts at my local hardware store. Big mistake! You wouldn't think a simple 3 inch bolt would be hard to find in your local hardware store. But in fact, i checked five hardware stores and none of them had this particular bolt. What a waste of time! I should have learned my lesson by now, and just give all my parts business to etrailer.com. I have probably spent more than $1000 in the past several months refurbishing our 1970 Shasta. Totally satisfied with the selection at etrailer, and the service is second to none!



by:

Had a leaf spring break on my off-road trailer in Mexico. Left it at a boat yard until I received the parts from trailer & returned to replace. Only took 2 hrs to replace both leafsprinhs, shackles, bolts etc. And we were back on the road.



by:

The package was poorly shipped and the package came to me split open losing the nuts for bolts. these are special nuts and i can't just go to hardware store to buy some. When I called for replacement nuts they seemed to want to do things right. and said they would be expedited to me
Got a message the next day saying it is going to take 6 days to receive. That does sound like expedited to me. If it was packaged better I would have finished my project, now it is on delay .



by:

It worked great for my trailer.



by:

We have had great experience with eTrailer, These parts came in as described.



by:

I think etrailer is Great. I think their customer service is fantastic. My wife and I were in Arkansas, 1200 miles from our home in Ft. Myers Florida. I replaced the original springs on our trailer with new heavy duty springs, but never changed the hangers or bolts. Our trailer was riding very poorly, we needed new hangers and bolts badly because we were headed on a very long 9000-mile trip with many stops all the way to the Monterey CA. etrailer found us a UPS Store along our route to send us the parts that we needed. Many thanks to etrailer for great parts and Fantastic customer service and for helping us with our most Wonderful Adventure!



by:

We have had nothing but wonderful experiences with the Products from etailer. They have always been very professional and courteous on the phone and very knowledgeable. As a business owner myself, I would highly recommend etrailer.



by:

Service is outstanding

Terry

4/28/2024

Sold trailer.



by:

I bought springs, shackle bolts, and u-bolts and plates. Everything was great and fit perfectly. Only issue were the u bolts which were not galvanized. However, at a local trailer store, I bought galvanized U bolts for $4.50 each.
For the DYIers, taking the old ones off took more than 4 hours for each side. My existing shackle bolts were so heavily rusted that I had to cut three off with a hack saw. Difficulty was confined space to operate hack saw with boat still on trailer. However, reassembling the new springs was less than 45 minutes each side.
Must have tools are large diameter 3/4-13/16-7/8 deep sockets (6 point), 2 2 foot long breaker bars and a can of PB blaster.
For safety: Good quality jack stands, minimum of 3--don't rely on the front trailer jack as it may roll.
By the way, I did these myself and I am 64 years old.



by:

Other than the parts taking a month to process, once they were gathered and packaged, they were delivered within 2 days! I replaced both sides with new 3-leaf double eye springs, 4 shackle straps, 6 shackle bolts, 2 Dexter U-bolt plates, and 2 U-bolts. They were really easy to replace and I did it quickly. Looks great, gonna take her out soon.



by:

worked perfect



by:

Perfect fit!



by:

I purchased the 3000# axle springs and all mounting hardware to replace the old ones on my 1963 travel trailer. My trailer no longer leans to the left and goes down the road better than new. I should have done it many year ago. I received my package on time and installation was easy and fit perfect. Thanks Bridget



by:

I am very pleased with the quality and obvious necessary strength of these shackle bolts and the locknuts. I do wish the free shipping incentive was "Orders Over $50" vs $99 as well as a quicker turnaround for delivery. I ended up having my local trailer guy providing the 3 shackle bolts I needed but I will use these to replace the other 3 eventually and have one to spare. Overall though, I am pleased with this order and appreciate etrailer.com having the selection of components I needed.

Nathan

8/6/2022

My trailer is still going strong and the last periodic maint check of my shackles, bolts, and nuts is A-OK.



by:

I bought a used Jon Boat trailer and first time out the shackle bolt gave out. Perfect fit for my application and I really like the way the nut was made so that it locked on the bolt. I used these with the Never Fail Bushings. I had to drill out the shackle to accommodate this beefy bolts but that wasnt a big deal. I ended up doing both sides that had standard bolts instead of wet bolts. Not sure why only 2 were regular 3/8 inch bolts.



by:

I fixed my 5 wheel today with all the parts I got from you changed,all the equlizers and the shackles on both sides,my fifth wheel camper was blowing tires left and right.the shackles were almost wore all the way through the the end of the shackle.the tires were out of line with a straight line by two inches,when I got the new parts on the tires were right in line.thanks for the great prices and your web sight was easy to use and fast shipping I will be ordering from you again.thanks ron

Ron A.

7/20/2016

The equilizers worked great I havent blown a tire yet thanks for all your help Ron



by:

Great product, great service, can't say enough good things about trailer...

William

1/21/2019

Still going strong!!! I dont really beat on my stuff. I was given a trailer that had seen better days, I rebuilt most of the mechanicals on it & its still serving me well…Thanks for the follow up though…



by:

I haven’t had a chance to install it yet. If It goes smooth
Y I think I will order the the upgrade package that was recommended by your agent.
For now I just wanted to get my camper back to factory specs.



by:

I replaced my leaf springs and shackles on my trailer and these bolts fit perfect. They come with lock nuts and they definately won't be coming loose. If I had to do it again I would have bought an impact wrench to make the job go quicker.



by:

Worked perfect!



by:

Just what I needed



by:

I had rusted old bolts and leaf springs, these were great replacements. No issues look great work well and fast shipping.


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Show More Reviews

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

  • Torque Spec for 9/16" x 3" Long Bolt for Suspension
    There is not a specific torque requirement for bolts like the Shackle Bolt # 166081. You'll want to make sure that you're using a lock nut and ensure that the bolts you use are long enough so that when installed you will have at least 2 threads protruding that lock nut.
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  • Can Double Eye Trailer Leaf Springs Install Without Shackles
    Feel free to send me the pictures you have via email. If one side of the suspension hangers doesn't have a shackle setup you'll need to install some so that suspension can extend as it compresses. Otherwise it won't function well since the spring would have no where to stretch to as it compresses. For 3-1/8 inch shackles we have the part # TRSL313. Then for a shackle bolt that comes with a nut you'd want the part # 166081.
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  • 3-Leaf Double-Eye Spring for 2,000-lb Trailer Axles Shackle Bolt Diameter
    The 3-Leaf Double-Eye Spring for 2,000-lb Trailer Axles - 20-3/8" Long part # e84SR takes a 9/16" diameter shackle bolt like part # 166081. The trailer's weight rating is determined by the two axle capacities so one axle would not need to be rated to support the whole load if it's a tandem axle trailer. The capacities would be split up. If your boat is gear, fuel, and trailer is around 3,200 lbs I recommend to go with the 2-2,000 lb axles and 1,000 lb leaf springs because if not your...
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  • Replacement Equalizers Measuring Approximately 6 Inches Long x 4 Inches Tall
    I do have options for you but they would need to be purchased individually as we do not offer an all inclusive kit with equalizers, shackles, and bolts in the size you need. The closest equalizer we have to the provided dimensions is part # TREQ310 which measures to be 6-1/16" from the center of the bottom two bolt holes and 4" from the center of the top bolt hole to the center of the bottom bolt hole. These equalizers work with 1-3/4" wide leaf springs with 9/16" spring eyes. I have attached...
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  • Additional Suspension Parts to Add an Axle to a Tandem Axle Trailer
    The first thing I need to tell you is that mobile home axles are designed for one-time use only by the manufacturers. Because of this replacement parts are nearly impossible to find. I would urge you to switch to regular axles so replacement parts are readily available. I have linked the axles we carry for you. The main problem you might run into when adding another axle is wheel scrubbing. When making turns its likely that the front axle tires will drag on the ground. Also to maintain...
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  • Replacement Leaf Springs And Hardware On A 2013 Pace American White Out Snowmobile Trailer
    The 4-Leaf Double-Eye Spring for 3,500-lb Trailer Axles # e54SR sounds exactly like what you need for your 2013 Pace American White Out Snowmobile trailer. When choosing a replacement leaf spring, you'll want to focus on matching the new leaf springs capacity with the old leaf spring, and have it be slightly shorter (about 1/2-1 inch) because the old leaf springs will eventually flatten or stretch over time. For a U-bolt kit, we have the U-Bolt Kit for Mounting 3,500-lb, Round Trailer...
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  • Length of Redline # 166081 Suspension Shackle Bolt
    According to Redline, the # 166081 bolts are 3.1 inches long.
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  • Availability of Replacement Trailer Suspension Parts in Kit Form
    The Redline Tandem-Axle Trailer Hanger Kit you referenced, part # APT8, does include the hangers as you noted. All of our kits include the hangers. If you do not want them you can order the other components as individual items. The linked page will show you all trailer suspension component parts like equalizers, bushings, shackle links, bolts, etc. and you can select only the items you need. You can use 2 of # TREQE1, 8 of # 115052 and 14 of # 166081.
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  • Leaf Spring and U-Bolt Kit for Dexter 4,000 lb Axle
    Yes the leaf spring part # e27SR would be the correct spring for your 4,000 Dexter axle. This is a very standard length trailer leaf spring at 26 inches and will work well on your trailer. Then for a U-bolt kit part # APUBR-1 would be what you'd need and then for shackle bolts part # 166081.
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  • Replacement Leaf Spring Assembly for a Single Axle Cargo Trailer
    Thank you for the photos! They really helped. For your double eye leaf springs, the 4-leaf 25-1/8" Long, part # e54SR, that you referenced are in fact the right ones for you. The reason they are slightly shorter than your current ones is because they tend to stretch a little over time. Also, remember that you will need two. From your photo, it looks like you might have trouble with the existing hardware when removing the old springs and installing the new ones due to rust. If you end...
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  • Replacement 2K 26 Leaf Springs for Boat Trailer
    The correct leaf spring to use will be the 4-Leaf Double-Eye Spring part # e77SR which is 26" long but keep in mind leaf springs stretch over time so the correct replacement is usually shorter than the existing. In regards to the u-bolts, the correct kit would be the CE Smith U-Bolt Kit for Mounting 2,000-lb, Round Trailer Axles part # CE23000. Then for the shoulder bolts, you can just use part # 166081.
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  • How Is the Shackle Bolt with Locknut for Double-Eye Springs 166081 Measured
    The length of the Shackle Bolt with Locknut for Double-Eye Springs part # 166081 does not include the bolt head, just the shaft. I have attached a photo below.
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    Image 1 for
  • Using Wet or Dry Shackle Bolts in Rear Leaf Spring Hanger of Single Axle Trailer
    You can certainly use the 30-20 spring hanger with the # 166081 bolts, or you can use the wet bolts like part # 126B2. The bolt features a grease zerk that would allow you to grease the inside of the bushing. Using the wet bolt would probably make the suspension a bit quieter as well as helping the component to last longer.
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  • Can I Replace 4 Leaf Springs With 5 Leaf Springs For The Axle On My Trailer
    Yes, you can replace your 4 Leaf Springs with 5 Leaf Springs like part # e34SR as long as you replace all of the springs at the same time. There really isn't any advantage if you want to go with 5 leaf springs over 4 leaf springs. Typically, you always want to try to get the same parts to replace what you already have, but 1/8 of an inch difference per leaf spring won't make much of a difference in how everything fits together. The 5 leaf springs will work just fine for you. We also have...
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  • Replacement Double Eye Leaf Springs 26 Long For A 2003 Bass Boat
    I do have the perfect replacement option for your 2003 Bass Boat. For a 26" long double eye leaf spring, I recommend using the 4-Leaf Double-Eye Spring for 2,000-lb Trailer part # e77SR as long as your current leaf springs are 1-3/4" wide, these will work great for you. Our leaf springs are sold individually, therefore you will need to purchase 1 spring per side of each axle. I also recommend replacing the shackle bolts with our Shackle Bolt with Locknut for Double-Eye Springs part #...
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  • Replacement 2,000LB Trailer Leaf Springs For 1962 Aristocrat Single Axle Trailer
    I recommend the 4-Leaf Double-Eye Spring for 2,000-lb Trailer Axles # e77SR to replace the springs on your 1962 Aristocrat single axle trailer. These are the same 1-3/4" wide springs with a 26" measurement from bolt center to bolt center. As springs wear and sag it is normal for the measurements to appear longer than what they are when new so this will be the best one for your 2,000lb trailer. Be sure to replace both springs as a set. With the age of your trailer you should also get a...
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  • What Leaf Spring Bushings Will Work With My 3" Shackle Bolt W/ Locknut For Double-Eye Springs
    Using the Shackle Bolt with Locknut for Double-Eye Springs - 3" Long, part # 166081, indicates that your leaf springs are 1-3/4". If that is the case, the bushings you need have an inner diameter of 9/16" and an outer diameter of 11/16". Something like the Nylon Bushings - 9/16" Inner Diameter, 3/4" Outer Diameter - 1-3/4" Long - Qty 6, part # SP05-060, will work. We do have other options. I have included a product description link, demo video links, and a weblink to our bushings for...
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    The Zinc Shackle Bolt with Locknut for Double-Eye Springs - 3" Long # TRFA73Z916DLNZ is a grade 5 bolt. Your setup as described is a standard setup for leaf spring hangers and double eye leaf springs. The # 166081 is made by the same manufacturer and is used more commonly than zinc plated for most factory applications. The cost difference comes down to supply and demand. The Dexter bolt # 007-003-01 is simply a different manufacturer that has a big name in the trailer axle market. ...
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  • How Tight to Get Boat Trailer Leaf Spring Shackles
    There is no specific torque rating for shackle bolts. You'll want to ensure that the bolts you use are long enough so that when installed you will have at least 2 threads protruding from the nut. Make sure that the bolt you're using has a lock nut, like part # 166081. If the bolt you are using has knurls at the bolt head, tighten the bolt down until the knurls go through the shackle link or hanger and the bolt head is flush. Then back off the nut slightly so that all of the components...
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  • Could Spring Eye-Bolt 166081 be Used with Leaf Spring SP-040275
    The spring eye-bolt part # 166081 is 1/2 inch shorter than the part # 166079 at 3 inches and would work well with the slipper spring part # SP-040275 that you referenced.
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  • Torque Specs for Redline Shackle Bolt with Locknut
    There actually is not a specific torque rating for shackle bolts like the Redline # 166081 that you referenced. You just want to make sure that the bolt is long enough so that when installed you have at least 2 threads protruding from the nut. This particular bolt measures 3 inches in length and the locknut is included. I have attached a short video demonstration that you can also check out.
    view full answer...
  • Comparing Lippert Never-Fail Bushings to the Bronze Bushings and Wet Bolt Option for Tandem Axles
    The bronze bushings and wet bolts are a great option but they still do require maintenance especially under the conditions you referenced. There really isn't any new information in comparing it is basically the difference between maintenance required and zero maintenance. The Never-Fail bushings # LC279685 are maintenance free and self-lubricating so they will be a better fit for you. This kit comes with the bushings for 4 springs and two equalizers for a complete tandem axle trailer....
    view full answer...
  • Can Standard Shackle Bolts Replace Stepped Shackle Bolts
    The Step Wet Bolt # 34007-187-00 is a 9/16-inch diameter overall and 3-inches long. The threaded portion is a smaller 7/16-inch diameter (which is the "step"). You can use this part with the matching 7/16 nut # 192600 or you can use standard non-stepped 9/16-inch bolts like # 126B2 (which has a grease zerk fitting) or part # 166081 that does not.
    view full answer...


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