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Brake Mounting Bolt for 12" Brake Assembly

Brake Mounting Bolt for 12" Brake Assembly

Item # 7-5
Our Price: $1.82
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Shipping Weight: 0.05 lbs
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  • Reviews (39)
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Redline Accessories and Parts - 7-5

  • Trailer Brakes
  • Electric Drum Brakes
  • Hydraulic Drum Brakes
  • Hardware
  • Bolts
  • Redline
  • 12 Inch


  • Brake Mounting Bolt for 12" Brake Assemblies
  • Length: 1-1/4"
  • Bolt Size: 3/8"-24
  • Grade 5 bolt
  • Lock washer and nut sold separately

Note: Color of bolt may vary.

191000 Redline Brake Mounting Bolt

Video of Brake Mounting Bolt for 12" Brake Assembly

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

Video Transcript for Redline Trailer Brakes 7-5 Review

Today we're going to review part number 7-5. This is the 3/8ths inch size brake mounting bolt for 12 inch brake assemblies. Now this brake mounting bolt is used to attach a brake assembly to your trailer. The size on this is a 3/8ths inch by 24. 3/8ths inch meaning the diameter of the bolt size right here. 24 means 24 threads per inch. Now this is a grade 5.

If you see the markings on it, there's 3 marks. That means it's a grade 5 bolt. A few measurements on this. If we do the overall length from the very top to the end, it'll be right at 1 and a quarter inches. The threaded portion is right at 1 inch. Now the head size on this, I pulled the socket that it's made to fit.

It's using a 9/16ths size socket to fit the head, which you use to tighten it down or take it off. This is also to be used with two separate products that you'll need when you install your brake assembly. One would be the lock washer. We do sell that separately. It's listed on the product page of this bolt as a related product and that's part number 38LW.

The other one would be the nut, which is part number 38N. This is the 3/8ths inch size nut and this will also be listed on the products page as a related product. This would all be used to put your brake assembly onto your trailer and just to give you an idea, the size on the nut would also be the socket size of 9/16ths. That should do it for the review on part number 7-5. This is the 3/8ths inch size brake mounting bolt for the 12 inch brake assemblies.

Customer Satisfaction Score:

Customer Reviews

Brake Mounting Bolt for 12" Brake Assembly - 7-5

Average Customer Rating:  4.8 out of 5 stars   (39 Customer Reviews)


The axles that I ordered last year are still working out great. But even better than the parts was the service I got from etrailer. It was so great working with a company who took the time to listen to my project and help me get the right parts I needed, especially coming right off the heels of a terrible experience dealing with bad information and wrong parts from a competitor. Even with some damages in shipping, the returns/ and replacements were no hassle, with most issues being quickly resolved and not even costing me any additional downtime. As a contractor keeping a small fleet rolling, your competency and professionalism have made me a customer for life!! You guys at etrailer will be my first stop for trailer parts.


Just received my order of new backing plate assemblies and some misc small parts. Ordered on line late Sunday night, confirmed I had ordered the right parts Monday morning before shipment went out. Customer service by phone was superb and the gal I talked with was perfect. Shipment was on my porch Friday afternoon. I did open box and inspect shipment that arrived completely intact/good shape and all looked good at this point. Not sure when will get to the brakes on the trailer but will post again when the job is done. So far nothing but good to say about Regards, John.


Replacing the brakes on a 50 year old FAN camper. After being assured that it had 10 inch brakes by another company"s "expert" because it has a 3500# axle, I finally received the correct 12 inch brakes from eTrailer. They arrived very quickly, and packaged well. The installation went almost as easy as the very helpful online video showed. Only difference was I had to slightly tighten the brakes to slide the hub over them, even though they are self-adjusting once in service. I have never owned or worked on a trailer before, and the installation was relatively easy. Thank you to George J for the followup email within 24 hours of delivery.


Nuts and bolts are nuts and bolts but I can report that the self-adjusting brakes have worked well on our two-thousand mile trip this summer through the mountains of Utah, Idaho, Nevada, Oregon and Washington. They stop straight and true and don't seem to fade on those long down grades like the infamous "Cabbage Hill" near Pendelton Or.


The electric trailer brakes arrive within three days of ordering. The parts were a perfect fit. Etrailer' support is second to none! Helpful videos and live support available. The four trailer brakes were $100.00 less expensive than the nearest competitor and free shipping too!


The whole order was perfect. I'm rebuilding the running gear on a1976 3 horse slant then remodeling the whole trailer by converting the trailer into a communications trailer for HF radio for disaster response. Front area will be living quarters. I am in our State Guard as a radio operator and also in county emergency management. This trailer will be my shelter and operating station when deployed to hurricanes and such. Since I'm spending my own funds on this, the good prices on etrailer are greatly appreciated.


Bought these bolts just in case and was glad I did. Turns out, my backing plates had fixed studs rather than bolts, but having these on hand made reassembly a snap. Threads matched the nuts perfectly. Highly recommend.


bought a brake assembly that needed fastening to the axle; these nuts, bolts and washers were just what I needed. Thanks George J.


Could not be more pleased. My set of fully assembled brakes arrived earlier than expected and were as described. The prices at Etrailer were the lowest found while shopping for the brake assemblies. Great job Etrailer!


Hardware for my new brakes, word to the wise...get them when replacing your brakes...your trailer and patience will love you for it.


Bought brake replacement kit for 20 ft gooseneck trailer, exact fit


Ordered lots of parts on Monday, received most of them by Thursday. The received parts were well packaged and undamaged. A few of the parts they didn't have in stock so they had those drop-shipped to me which should be delivered in the next couple of days.
No supplier I have ordered any parts from has such a great technical reference web site or personal customer support. Yea, Rebecca - Well Done! Yes, I'm very happy with the pricing.
Thanks for your great support and I look forward to doing business with them again. More info to follow as soon as I can get the parts installed on my trailer.


Carla M. worked with me to make sure we had all the right parts for my boat trailer. I am quite happy with her help.


It was difficult to find the proper equipment for my particular vehicle. E. Trailer was a life saver and the service was super. My service rep., Nicki K. went "out of her way" to help me. Couldn't ask for more than that!


Excellent, fine thread, grade 5 bolts...I torqued to 40 ft-lbs.


The parts have worked out very well and have not had any problems. Thanks again for the parts and good service.

Millard J.


Sorry it took so long to answer but have been real busy. My daughter is very happy with the parts that we have gotten from you and things are still good. Thank you for asking,


Great service. Etrailer does an excellent job of filling the orders and getting them sent. Shery was really good handling our order. Thanks again.


Very dependable


Just as described, arrived promptly as always from etrailer.


Happy with the bolts and good price.

Doug G.


bolts was fine.


All parts ordered were of excellent quality, Thanks!




great products with very reasonable prices, quick shipping and excellent service follow-up


These bolts worked great for me!


I have had no problems

Show More Reviews

See what our Experts say about this Redline Accessories and Parts

  • Does Brake Assembly to Brake Drum Dimension Need to be Verified When Adding Brakes to Trailer
    I am not sure which exact dimension you are looking for but the good news is that if you have properly installed brake mounting flanges there would be no need to verify clearance between the brake assemblies and the drums as all of that would be positioned correctly. I attached a help article on adding brakes to a trailer for you to check out as well.
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  • Nut for a 3/8"-24 Thread Brake Assembly Mounting Bolt
    For bolt # 7-5 use nut # 38N. It has the same 3/8"-24 threads as the bolt. The nuts are sold in quantities of 1.
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  • Can 12 Inch, 7,000 lb Electric Trailer Brake Kit Work on Vehicle With 24 Volt System
    Though I'm not quite sure what you are referring to in regards to a misunderstanding, your truck with a 24 volt system is compatible with 12 volt electric brakes, the Dexter Electric Trailer Brake Kit - 12" - Left and Right Hand Assemblies - 7,000 lbs # 23-180-181. The power to the brakes will actually come via the brake controller, so you will need to wire your brake controller a bit differently in order to get working brakes. I have added a link below to a help article on how to do this,...
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  • Is Using Electric Brakes on a Boat Trailer Recommended
    You can indeed use electric brakes on a boat trailer. At one time it wasn't a recommended practice, but then the boat manufacturers started using electric brakes on trailers and found that it works fine. I would urge you to unplug the trailer before backing it into the water, and when pulling out allowing a few minutes to drain and dry out somewhat before plugging back in. The Dexter # 23-180-181 brake assemblies are meant for 7K axles using 12x2 inch brake assemblies. The assemblies...
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  • What Kind of Steel is Brake Mounting Bolt 7-5 Made From
    This Brake Mounting Bolt for 12 inch Brakes Assembly, part # 7-5, is not made of stainless steel, it is made of regular steel. You might also be interested in purchasing a Nut for Brake Mounting Bolt for 12 inch Brake Assembly, part # 38N, and a Lockwasher for Brake Mounting Bolt for 12 inch Brake Assembly, part # 38LW.
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  • Does Dexter 12 Inch Electric Trailer Brake Assembly # 23-181 Include the Mounting Hardware
    The replacement right-hand brake assembly you referenced, part # 23-181 does not include the mounting hardware. You'll need 5 of the # 38N nuts and 5 of the # 7-5 bolts. Something else to be aware of, some time ago Dexter stopped including the mud and crud plugs that cover the brake adjuster holes. We offer them as part # BP10-220 for 4 plugs.
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  • Replacing the Brakes on a 1966 Airstream Travel Trailer
    The Dexter Electric Trailer Brake Kit part # 23-112-113 is designed for 6,000 lb axles that use a 5 bolt brake mounting flange. They are compatible with 14.5" to 16" diameter wheels. As long as your trailer has these requirements then the brakes will work well for you. Unfortunately, we do not have information as to what braking assemblies your 1966 Airstream trailer came with therefore you will need to go out to your trailer and physically count the bolt holes on the brake flange and measure...
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  • Free-Backing Drum Brakes for M101A2 Military Dump Trailer
    To check the fit and compatibility for a set of replacement hydraulic drum brakes on your M101A military dump trailer you will want to match up a few things. Those things are drum dimensions, axle weight capacity, mounting bolt pattern and the compatible wheel sizes. The linked photo shows how to check your drum size. The Dexter free-backing 12 x 2-inch brake kit you mentioned # 23-342-343 is suitable for axles rated up to 7K, they use a 5-bolt mounting pattern and they fit wheel diameters...
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  • Install Hardware for 12 inch Trailer Brake Assemblies
    For 12 inch assemblies like the # 23-105-09 that you referenced we have the bolts part # BRKH12 designed as a fit. This is a kit with nuts, washers and bolts. This is all you'd need to install the assemblies after removing your old ones.
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  • Will Electric Brakes Bolt On 7,000 Pound Torflex Trailer Axles
    The Electric Trailer Brake Assembly, Self-Adjusting # AKEBRK-7L-SA that you referenced will bolt directly to the 5-bolt brake mounting flange on your 7,000 pound trailer axle. The # AKEBRK-7L-SA is the brake assembly for the left hand side of the trailer. The brake assembly for the right hand side is # AKEBRK-7R-SA. These brake assemblies fit hubs that measure 12 inches diameter x 2 inches thick and will work well on your 7K torflex axle. I've attached a review video of this brake assembly...
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  • Electric Brake Assembly for 12 Inch Hubs With 4 Bolt Mounting Flange
    There is one electric brake assembly that may be able to work for you, the Dexter Electric Brake Kit # 23-105-106-09. This kit fits standard 5-bolt mounting flanges or AL-KO/Hayes 4-bolt flanges; if you have this type of 4-bolt flange you would likely know it because the pattern is offset, with the upper mounting bolt holes spaced further apart than the lower holes. These brakes are rated for 6,000 lbs and come with the mounting nuts but would require Brake Mounting Bolts # 7-5 and Lock...
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  • Torque for 7,000 lb, 12 Inch x 2 Inch Dexter Electric Brakes
    The Dexter Electric Trailer Brake Assembly - 12" - Right Hand - 7,000 lbs # 23-181 and Left Hand # 23-180 should should be torqued to 30-50 foot/lbs.
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  • Bolts and Lock Nuts to Use for Mounting Kodiak Disc Brake Kit # K2HR79E
    For mounting bolts to mount the brackets of the # K2HR79E to the flange we have the part # 7-5 for the bolts and then # 38LW for the lock nut.
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  • Are New Backing Plate Bolts Included With Electric Brake Assembly for 6K Axles # 23-459
    I walked out to the warehouse to look at the Electric Brake Assembly for 6K Axles, part # 23-459. The brake assembly does not include the backing plate bolts. I would recommend installing new bolts and nuts for easier installation and safety. For mounting bolt, you would need Brake Mounting Bolt, part # 7-5, which is sold as a quantity of 1. For mounting nuts, you would need Nut for Brake Mounting Bolt, part # 38N, which is also sold in quantity of 1. You will also want to use Lockwasher...
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  • Recommended Mounting Hardware for 12 Inch Electric Brake Assemblies # 23-106-09
    The brake mounting bolt for 12 inch electric brakes # 23-106-09, that you referenced are part # 7-5 for the bolt. For the matching lock washer and nut you will need are # 38LW and # 38N. I have linked all the above mentioned products to this page for your purchasing convenience.
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  • Replacement 12 x 2-Inch Electric Brake Assemblies for 2004 Winston Equipment Trailer GVWR 15850
    The brake assembly you referenced, # 23-105 from Dexter, is a left-handed 12 x 2-inch electric drum brake that has a 6000-lb capacity. It uses a 5-bolt mounting pattern (hardware sold separately). The matching right-handed brake is part # 23-106. I checked the Winston Trailer website but I could not find specs for the brakes used on their trailers. The link provided will let you see all left- and right-hand 12 X 2-inch electric trailer brakes, including types that adjust automatically,...
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  • Recommended Brake Assembly 12x2 with 4 Bolt Mounting Pattern
    For your 12x2 electric brake assemblies, I recommend the Dexter Electric Brake Kit for 4 Bolt or 5 Bolt Flange - 12" - Left/Right Hand Assemblies # 23-105-106-09. These assemblies will fit your 4 bolt flange and will work well on your trailer. The mounting nuts are included but the bolts are not. If you need the bolts and lockwashers, I recommend # 7-5 and # 38LW. You may also want the brake adjustment tool # W80630 to install and maintain your brakes.
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  • Recommended Brake Assemblies For Dexter Axle 3500 lb And 5200 lb
    I reached out the the manufacturer and found that they have two possible axles that meet that criteria. One is definitely more likely your application than the other, but I will give you both brake assembly options. For a 3500 lb axle, you will want the Electric Trailer Brake Kit - Self-Adjusting - 10" - Left and Right Hand Assemblies - 3,500 lbs # AKEBRK-35-SA. This will give you both the left and right assemblies. There is a sticker to help you with which assembly fits which side....
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  • Can the Brake Assemblies Replace Hayes AL KO Brakes Assemblies
    We have brake assemblies that will work for you, but unfortunately it will not work to replace your existing Hayes/AL-KO brake assemblies with our self-adjusting brake assemblies. For your Hayes axle, you will want to use the 12 Inch Electric Brake Assembly, Left Hand # 23-105-09 and Right Hand # 23-106-09. These brake assemblies are designed to work as replacement assemblies for Hayes/AL-KO axles so they will work well on your trailer. The reason other assemblies will not work for your...
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  • Replacement Electric Brake Assemblies for Denali Trailer with Tandem 5.2K Lippert Axles
    I'm assuming that you're simply replacing the existing brake assemblies and that your trailer has hub/drums that have an inside diameter of 12 inches and a depth of 2 inches. I'm also assuming that your existing brake drums are in good shape, and you're planning on reusing them. If that's the case, I'd recommend the self adjusting electric brake assembly, part # AKEBRK-7R-SA for the right hand side, part # AKEBRK-7L-SA for the left. You'll need two of each. The brake assemblies don't include...
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  • Is the Dexter Electric Trailer Brake Assembly # 23-451 Made in the USA.
    Yes, the Dexter Electric, Right Hand Side, Trailer Brake Assembly, # 23-451, is manufactured by Dexter in the USA. For the left hand side trailer brake assembly and hardware, you will need part numbers # 23-450, # 7-5, # 38N, and # 38LW.
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  • Brake Flange Mounting Bolt Recommendation for Kodiak Disk Brake Kit K2R526D
    The brake flange mounting bolts are not included with the Kodiak Disc Brake Kit # K2R526D that you referenced. If you need bolts you would want the part # 7-5 for the bolt, part # 38LW for the washer and part # 38N for the nut. These aren't stainless, but they will still work fine. If you wanted to go with stainless you would have to source them at a hardware store.
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  • Are Brakes Included With 7,000 lb E-Z Lube Dexter Trailer Hub and Drum Assembly
    The brakes are not included with hub and drum assemblies, including the 7K E-Z Lube Dexter hub and drum you asked about, but we do have the correct fit; the parts you need are the following: - Dexter Trailer Hub and Drum Assembly - 7K lb E-Z Lube Axle # 42866UC3-EZ - Dexter Electric Trailer Brake Kit - 12" - Left and Right Hand Assemblies - 7,000 lbs # 23-180-181 - (Quantity of 10) Brake Mounting Bolt for 12" Brake Assembly # 7-5 - (Quantity of 10) Lock Washers # 38LW The electric...
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  • Brakes for 12" x 2" Drums and 4-bolt Mounting Pattern
    We only have one electric brake assembly that may work for you, the Dexter Electric Brake Kit # 23-105-106-09. This kit fits standard 5-bolt mounting flanges or AL-KO/Hayes 4-bolt flanges. If you have that type of 4-bolt flange you would likely know it because the pattern is offset, with the upper mounting bolt holes spaced further apart than the lower holes. These brakes are rated for 6,000 lbs and would require Brake Mounting Bolts # 7-5, Nut # 38N and Lock Washer for Brake Mounting...
    view full answer...
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