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Equalizer Bolt with Cotter Pin and Castle Nut - 7/8" Diameter

Equalizer Bolt with Cotter Pin and Castle Nut - 7/8" Diameter

Item # 166078
Our Price: $21.56
Trailer Leaf Spring Suspension
Orders above $50 qualify for Free Shipping
Shipping Weight: 1.11 lbs
In Stock
Redline Suspension Bolts - 166078
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4-11/16" Long suspension bolt comes with a locking castle nut and a cotter pin to secure equalizer to hanger. Lowest Prices for the best trailer leaf spring suspension from Redline. Equalizer Bolt with Cotter Pin and Castle Nut - 7/8" Diameter part number 166078 can be ordered online at or call 1-800-496-5010 for expert service.
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  • Reviews (22)
  • Q & A (0)
  • Videos (1)
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Redline Trailer Leaf Spring Suspension - 166078

  • Camper
  • Car Hauler
  • Utility Trailer
  • Suspension Bolts
  • 4-11/16 Inch Long
  • 7/8 Inch Diameter
  • Redline

4-11/16" Long suspension bolt comes with a locking castle nut and a cotter pin to secure equalizer to hanger.


  • Secures equalizer to center hanger of tandem- or triple-axle trailer suspension system
  • Includes castle nut and cotter pin to lock in place


  • Length: 4-11/16"
  • Diameter: 7/8"

166078 Equalizer Bolt with Nut

Video of Equalizer Bolt with Cotter Pin and Castle Nut - 7/8" Diameter

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

Video Transcript for Redline Trailer Suspension 166078 Review

Today we're going to take a look at the 7/8 inch equalizer bolt with the castle nut and cotter pin. Now this part will secure an equalizer to the center hanger of a tandem or triple axle trailer suspension system. It includes the castle nut and the cotter pin to lock it into place. A few specs on this, the length on the bolt from the underneath of the head to the end is 4 11/16. The diameter is 7/8 of an inch. I just wanted to show you how this would work. We pulled an equalizer right here.

Here's the center hanger. If you notice on the center hanger it does have a square hole on this side and a round hole on this side. You just want to make sure on the bolt there's a square end right here. You make sure that goes through so when you drop it over there, run this through the hanger and the equalizer, you can see that it'll line up and then just take your castle nut, put it on there, and then once you get it tightened down run your cotter pin through there to lock it all into place. Take that off.

Now, we do sell the center hanger and the equalizer separately on our web site. They are listed on this product page as a related page. That should do it for the review on the 7/8 inch diameter equalizer bolt with the castle nut and the cotter pin.

Customer Satisfaction Score:

Customer Reviews

Equalizer Bolt with Cotter Pin and Castle Nut - 7/8" Diameter - 166078

Average Customer Rating:  4.7 out of 5 stars   (22 Customer Reviews)

4-11/16" Long suspension bolt comes with a locking castle nut and a cotter pin to secure equalizer to hanger.


Got my order a day sooner than expected very happy with the parts they fit perfectly


Fast shipping. Perfect fit!


These are DRY equalizer bolts. Grease-able WET bolts are available and have a zerk fitting on the head. It's easy to miss this when ordering. No idea why there is even a DRY bolt option.


A completely new set, bolt, nut, and cotter pin is a big advantage. Everything is high quality with precision machined threads that makes installing these a breeze. Combine with the TRBU13871 7/8 ID bushings for a complete equalizer pivot overhaul.


Parts were exactly as described, website was easy to maneuver , and shipping was very fast! I've already bookmarked as my go to for all trailer parts.


1 year after ordering parts from etrailer everything I have bought is still working great.


these parts were missing from original oder,, great response and service from customer service and I had replacements in 2 day thanks and Hats Off to Customer service


Received parts. Thank you.


Great company, quality parts at a decent price with swift delivery


Always a perfect fit.




Good web site for shopping on line.


Great service and easy ordering.




Worked perfect


Exactly what I needed


Perfect fit fast shipping





See what our Experts say about this Redline Trailer Leaf Spring Suspension

  • Availability of Equalizer Bolt, Cotter Pin, and Castle Nut for Tandem-Axle Trailer Hanger Kit
    For the middle equalizer bolt and nut that fits the Tandem-Axle Trailer Hanger Kit for 2" Slipper Springs # APTT6SE you need the Equalizer Bolt with Cotter Pin and Castle Nut - 7/8" Diameter # 166078. If you would like to upgrade to a wet bolt, there is also the Wet Equalizer Bolt with Castle Nut and Grease Zerk - 4-11/16" Long - 7/8" Diameter # TRFA71063 available as well.
    view full answer...
  • What Is The Difference Between Center Hangers TRHG291-C and 29-1?
    The Center Hanger for TruRyde Equalizer # TRHG291-C is specifically designed to be used with the Equalizer for 2" Wide Slipper Springs # TREQ4541. This is designed to work with trailer axles from 6,000-8,000lbs. The Redline Center Hanger for 2" Wide Slipper Springs - 3-1/2" Tall # 29-1 does have identical measurements and will bolt up using the Equalizer Bolt with Cotter Pin and Castle Nut # 166078 or Wet Bolt # TRFA71063. This hanger is rated for 3,500-9,000lb axles. So it will carry...
    view full answer...

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Info for this part was:

Employee Jeff D
Installed by:
Jeff D

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