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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: $7.50
Trailer Suspension Parts
Shipping Weight: 0.32 lbs
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166081 - 3 Inch Long ABS Fasteners Suspension Bolts
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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 suspension parts 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 (768)
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ABS Fasteners Trailer Suspension Parts - 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





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   (767 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:

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:

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:

It worked great for my trailer.



by:

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



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:

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:

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:

worked perfect



by:

Perfect fit!



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:

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 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:

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 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:

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.



by:

Order Received in good condition


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See what our Experts say about this ABS Fasteners Trailer Suspension Parts

  • Torque Spec For Leaf Spring Shackle Bolts
    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 are...
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  • Shackle Bolt Recommendation for the CE Smith Front Hanger Bracket # CE14016G
    The diameter of the holes that are used for installing leaf springs is 9/16 of an inch. A bolt like the part # 166081 would work as it is 3 inches long and the bracket is 2-1/4 inches wide.
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  • How to Determine Axle Placement on a Custom 5 x 9 ATV and Motorcycle Trailer
    When determining the axle placement on a trailer, an important factor to consider is the tongue weight. You want the tongue weight of the trailer to be approximately 10 percent of the gross trailer weight. Moving the axle rearward will increase the tongue weight of the trailer. A heavy tongue weight could cause issues with traction and sway when towing, but that is not as much of a concern on smaller trailers than it is on larger travel trailers or enclosed trailers. First, we want to...
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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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  • What is Needed to Switch From TREQE1 Equalizer to Shorter TREQ310 Equalizer
    Assuming you currently have 2-1/4" or 2-5/8" shackle straps, you should be able to replace your 7-3/4" Long # TREQE1 equalizer with the 6-1/16" Long Triangular Equalizer # TREQ310 with longer shackle straps. The longest that straps are the 3-1/8" Long Shackle Straps # TRSL313. You would also need the Wet Equalizer Bolt # 126B2 for the equalizer and Shackle Bolt # 166081 for, of course, the shackles. I have added links to video reviews for you to check out as well a link to a help article...
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  • Replacement Suspension Components for Tandem Axle Trailer With 6k Dexter Axles
    Thank you for providing that information. What you have is a 6,000 lb Dexter axle. Based on the axle capacity and your leaf spring measurement you can use the 4-Leaf Double-Eye Spring # e47SR which measures 25-1/8" long. The slight difference in length isn't going to make a difference. For an equalizer replacement you can use the Curved Equalizer for 1-3/4" Wide Double-Eye Springs # TREQE1. This measures 7-3/4" long x 2-7/8" tall. For the rest of the components I highly recommend upgrading...
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  • How to Determine the Correct Leaf Spring Replacements for a 1975 Rolco Tandem Axle Boat Trailer
    It may be possible that your leaf springs flattened out from 27 inches. The 27 inch leaf springs we carry for 3,500 pound axles is # SP-210275. The bolt with locknut you need is # 166081.
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    Image 1 for
  • Recommended Suspension Components For Double-Eye Springs On Tandem Trailer
    We do not have any kits that have all the components with the dimensions you asked for. You can go a couple ways. You can choose to go with the kit you asked about, part # APT4, and then choose different shackle straps. You will need a quantity of 8 shackle straps. We do not have 3 inch shackle straps available. We do have part # TRSL313, that measures 3-1/8 inches center to center. The overall length is 4-3/8 inches. Or you can order the following components separately (2) 6-1/4 inch...
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  • Leaf Spring Options About 25 Inches in Length For 6,000 lb Axle
    You said "about" 25 inches in length so I'll give you a couple options for what might work depending on the exact length you have, and if you want to go to a higher-rated, 7k leaf spring. Also, you'll want your replacement springs to be a bit shorter because leaf springs stretch over time. If you happen to have leaf springs a bit longer than 25 inches (say 25-1/2 inches) you can use the 5-Leaf Double-Eye Spring for 6,000-lb Trailer Axles - 25-1/4" Long # e78SR. Those are dacromet coated...
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  • Replacement 7,000 lb Leaf Spring & Mounting Hardware
    The 7,000 lb double-eye leaf spring we have that is closest to 26" is the 24-7/8" long 6-Leaf Double-Eye Spring for 7,000-lb Trailer Axles # e64SR. Assuming yours have flattened a good amount (which will definitely be true if the trailer is older), these will work out as a good replacement. You mentioned hardware, and I'm assuming you were referring to U-bolts, shackle bolts and straps. You'll need to measure your shackle straps but you can use the following: - U-Bolt Kit # APUBR-9 -...
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  • Dexter Axle Leaf Spring and Hub Replace 8-201
    The 8-201 trailer hub replacement is the part # 8-201-51UC3. This for a 6,000 lb axle so for leaf springs you'd want the # e94SR which is 26 inches long. For a U-bolt kit you'd want the part # APUBR-8 and then for replacement shackle bolts part # 166081.
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  • Replacement Trailer Suspension Shackles, Equalizers and Bolts
    We can help you with replacement trailer suspension parts for your Keystone Cougar. Our main page for suspension components is linked for you; on this you can select items like shackle straps, spring bushings, bolts and equalizers. Shackle strap # 115052 has a hole spacing of 2-5/8-inches, the closest to yours that we have. Overall dimensions are 4-inches x 1-1/4-inches and the bolt hole diameter is 9/16-inch. With this you can use standard bolt/nut # 166081 or wet bolt # 126B2 which has...
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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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  • 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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  • Recommended Suspension for 4x8 Trailer
    To give you the correct suspension, the axle capacity would be important. For the 4-Leaf Double-Eye Spring for 3,500-lb Trailer Axles - 25-1/8" Long # e54SR you were asking from would use the integrated bushings, the shackle straps # 115052 (x4), and bolts # 166081 (x6). If you need U-bolts use # APUBR-1.
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  • Are Bushings Included with Redline 6-Leaf Double-Eye Spring e64SR
    With the Redline 6-Leaf Double-Eye Spring # e64SR for 7,000-lb Trailer Axles the correct nylon bushings to use are already included in with the spring. If you need shackle bolts to install the springs you can use either dry bolt # 166081 or wet (greaseable) bolt # 126B2. For a single axle trailer you can use hanger kit # APS1. For a u-bolt kit to mount your 3-inch axle to your springs you can use part # APUBR-8.
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  • Individual Parts for Trailer Suspension Hanger Kit APT1 without the Hangers
    You can get the parts in hanger kit # APT1 separately but not as a kit minus the hangers. The equalizer is # TREQR83. For shackle straps you will need 8 of # 115052. For shackle bolts and nuts you would need 12 of # 166081. For the 3/4 inch wet bolts, pins, nuts, and grease fittings you would need 2 of # 126A1.
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    The longest leaf springs we offer are the 4-Leaf Double-Eye Spring for 3,500-lb Trailer Axles, part # SP-210275. These springs measure 27 inches eye-to-eye and are designed for axles up to 3,500 lbs. I have attached a photo of this spring that has the dimensions noted you can check out. When measuring the springs, the weight has to be removed from the springs. The leaf springs I recommend for your trailer are part # e84SR. This spring is designed to work with a 2,000 lb axle. The eye-to-eye...
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  • Availability of Wet Equalizer Bolts for a Joyrider Equalizer on a Prowler Trailer
    We do offer the wet shackle bolts you will need. The are the Wet Equalizer Bolt with Locknut and Grease Zerk, part # 126B2.
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  • Replacement Equalizer Measuring 6-1/8 Inches Long
    I do have all of the parts you need but unfortunately they are not offered in an all inclusive kit. Instead, you would need to purchase them separately. For this, you can use part # TREQ356 for the equalizer, part # 115052 for the shackle strap, and part # 166081 for the shackle bolt. I have attached a review video on each of the above parts for you as well.
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  • How to Pick Out Replacement Leaf Springs for 2007 Weekend Warrior Model CR3905
    I was able to find out that your 2007 Weekend Warrior model CR3905 is triple axle trailer with a GVWR of 16k. That means for each axle you'd need a capacity of at least 5,333 lbs. Which means you most likely have 6k axles. We have a few options for that capacity for leaf springs but you'll need to measure the length of your current springs to be sure. If you have 26 inch long springs you'd need part # e94SR. If you have 25-1/4 inch long springs you'd need part # e78SR. You should note...
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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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  • Replacement Parts to Rebuild Trailer Suspension on 1976 EZTrail
    All of the products you listed will work together just fine. Keep in mind, if your current springs are not 26 inch springs, like the # e77SR you referenced, your hangers, # APS4, will not be in the exact same position as your current ones. When repositioning everything the most important factor is keeping the axle in the same location it currently is. The U-Bolt Kit # APUBR-10 is correct for a 2,000 pound axle and the Shackle Bolt # 166081 will work too. It's hard to tell by the picture...
    view full answer...
    Image 1 for
  • 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.
    view full answer...


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Info for this part was:

Employee Mike L
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Mike L
Employee Michael H
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Michael H
Employee Jameson C
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Jameson C
Employee John H
Expert Research:
John H
Employee Zack K
Video Edited:
Zack K
Employee Joshua S
Video Edited:
Joshua S
Employee Lindsey S
Updated by:
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Employee Jeff D
Installed by:
Jeff D
Employee Bradley B
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Employee Nicholas E
Test Fit:
Nicholas E
Employee Dustin K
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Employee Alan C
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