bing tracking image
  1. Accessories and Parts
  2. Redline
  3. Trailer Brakes
  4. Electric Drum Brakes
  5. Hydraulic Drum Brakes
  6. Adjuster Plug
Adjuster Hole Plug for 7", 10", and 12" Brake Assemblies - Qty 1

Adjuster Hole Plug for 7", 10", and 12" Brake Assemblies - Qty 1

Item # 46-7
Our Price: $2.18
Accessories and Parts
Orders above $50 qualify for Free Shipping
Shipping Weight: 0.01 lbs
In Stock
Redline Trailer Brakes - 46-7
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

Customer Photos


Need help with installation?
Locate installers near me
Replacement adjuster plug fits many Dexter and Demco (Dico) electric and hydraulic trailer brake assemblies. 1-800-496-5010 to order Redline accessories and parts part number 46-7 or order online at Free expert support on all Redline products. Great prices and Fastest Shipping for Adjuster Hole Plug for 7", 10", and 12" Brake Assemblies - Qty 1. Accessories and Parts reviews from real customers.
  • All Info
  • Reviews (33)
  • Q & A (0)
  • Videos (1)
  • Photos
  • Why etrailer?

Redline Accessories and Parts - 46-7

  • Trailer Brakes
  • Electric Drum Brakes
  • Hydraulic Drum Brakes
  • Adjuster Plug
  • Redline

Replacement adjuster plug fits many Dexter and Demco (Dico) electric and hydraulic trailer brake assemblies.


  • Adjuster plug fits many Dexter and Demco (Dico) electric and hydraulic trailer brake assemblies
  • Dexter 7" x 1-1/4", 10" x 1-1/2", 10" x 2-1/4", and 12" x 2" electric and hydraulic brakes
  • Demco (Dico) 10" x 2-1/4" and 12" x 2" hydraulic brakes


  • Overall dimensions: 1.15" long x 0.992" wide x 0.381" tall
  • Quantity: 1 plug

Dimensions of Adjuster Plug

46-7 Adjuster Slot Plug for 7", 10", and 12" Brake Assemblies - Qty 1

Video of Adjuster Hole Plug for 7", 10", and 12" Brake Assemblies - Qty 1

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

Video Transcript for Redline Trailer Brakes 46-7 Review

Today we're going to review the part, which is the adjuster plug for the 7", 10" and 12" brake assemblies. This is for a quantity of one. This replacement adjuster plug is designed to fit many Dexter and Demco electric and hydraulic trailer brake assemblies. It fits the Dexter 7", 10" and 12" electric and hydraulic brakes and the Demco 10" and 12" hydraulic brakes. The quantity is for one plug. Just to give you an overall dimension on this, the length of it is about 1 and 3/32, and the width of it is about 15/32. What this is designed for, I just want to give you an example here.

I happen to pull a, let's go out a little bit. I pulled a 10" brake assembly, as you can see right here. At the very bottom of your brake assembly there's always a spot for an adjuster plug, you can see that spot right here. This plug is designed to go in there. What that slot is used for is when you adjust your brakes, there's a star wheel on the brake assembly, you'll take the plug out, put your screwdriver in there and adjust that star wheel to adjust your brakes. When you're done adjusting them, you just pop this adjuster plug in to keep any dirt or grime from getting into your brake assembly. That should do it for the review of the adjuster plug for the 7", 10" and 12" brake assemblies.

Quantity of one.

Customer Satisfaction Score:

Customer Reviews

Adjuster Hole Plug for 7", 10", and 12" Brake Assemblies - Qty 1 - 46-7

Average Customer Rating:  4.9 out of 5 stars   (33 Customer Reviews)

Replacement adjuster plug fits many Dexter and Demco (Dico) electric and hydraulic trailer brake assemblies.


Bought and installed complete electric brake system from etrailer, (with the help of the etrailer technicians), on my single axle trailer. I bought the following: Dexter Nev-R-Adjust brakes, Hubs, Pro Series Breakaway kit, wire & hardware. Price was half of what local retail wanted. Install was easy and brakes work great.
Videos were a great help in the wiring process.
Thanks etrailer


We thought these were rubber plugs, not the hard plastic, cheap ones.


Product was exactly what I needed and the price was right. I ordered the bolts to mount it at same time so I didn't have the issues others mentioned. The only issue I had was the new drum took a different sized seal, so I had to measure the hub and work with the local parts store to try to find a seal that fit. Eventually found one, assembled, bled the brakes out and was good to go. I would by from again without a worry.


Great products, great prices, fast shipping. I will buy from e trailer again.


Great product.I actually did not need these with the new electric brakes I installed but they did not cost much and now I have some back up parts

Still perfect, no issues at all
Jordon B - 03/30/2017


Simply put - Top drawer. I am not used to being treated this well. Most people these days just don't seem to care about customer service. The etrailer bunch are real pros and it shows. Shery T, Tommy C, Jennifer S , Nikki R , Nicole and others all were there when I needed them and I am grateful. The part I got had a manufacturing defect. They were interested In the problem, sent me a new piece with no hassle and fast. As I said, Top drawer.


This is a rubber / plastic plug that simply fits either by pressing in with your thumb or tapping in with a hammer. It prevents water from accessing the interior area of the brakes thru the adjusting holes on the back plate. Each unit installed will require 2ea. of these. I installed them prior to bolting onto the axle flange for ease of access and preadjusted the shoes fit prior to final axle/ bearing bolt up. Note, as noted by Etrailer, these must be ordered extra, they do not come with the brake unit.I recommend that one should replace the old ones as they are probably rubber and will eventually fall out.


Brought RV without these caps, while doing maintenance I noticed a built up of rust around the entire brake system. Cleaned up the brake system, found these caps on etrailer. Following year, doing my annual maintenance, not as much rust was present.


All the parts I have purchased from etrailer have been of the most top quality and match to a tee....the one purchase was tail lights for my RV they were so clearin fact they looked better then the factory lights!!!


Have been happy with everything I have ordered so far. The electric brakes were awesome and easy to install. Just received my last shipment and have not opened the box. Have a Merry Christmas and a happy new year. Dave


These tiny covers plug the slot for the drum brake adjuster. My trailer has not seen much service, but these are in fine shape 1 year later.


Great at keeping muck out of the brake housing area.


Good quality products at reasonable prices. I was especially pleased with the order status updates I received as my order was processed and shipped. I was notified that one product was not in stock and the manufacturer had a delivery date in a few weeks. I was given some other product options for that item. That's excellent customer service. Thank you etrailer.


Excellent customer service, fast shipping, great quality products, and it is nice to have the follow up in case of any problems. I would definitely buy from e-trailer again.

Chris H.


Fit the bill, just what I needed. Don't know why a brand new trailer didn't come with them.


Fits great


Great service. Products delivered as p romised.


Perfect replacement.


Items arrived ahead of schedule estimate and were excellent quality. --- Thanks!


As advertised.


Still in place doing the job..


Product worked as advertised.


Received in great condition. Installed with no problem.


Ok product


good product, good price, good service

Show More Reviews

See what our Experts say about this Redline Accessories and Parts

Do you have a question about this Accessories and Part?

  • Why

    At we guarantee:
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate accessories and part information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Employee Jeff D
Installed by:
Jeff D
Employee Wilson B
Written by:
Wilson B

At we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.

Product Experts Available Now!
Call 1-800-496-5010