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Boat Trailer Roller Bunk Bracket for Dutton-Lainson Roller Bunks Parts DL21740 & DL21741

Boat Trailer Roller Bunk Bracket for Dutton-Lainson Roller Bunks Parts DL21740 & DL21741

Item # DL21742
Our Price: $17.35
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Shipping Weight: 1.52 lbs
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DL21742 - Zinc-Plated Steel Dutton-Lainson Roller and Bunk Parts
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Dutton-Lainson Boat Trailer Parts - DL21742

  • Roller and Bunk Parts
  • Brackets
  • Bunk Bracket
  • Zinc-Plated Steel
  • Dutton-Lainson

Boat Trailer Roller Bunk Bracket for Dutton-Lainson Roller Bunks


  • Roller bunk bracket, for mounting galvanized Roller Bunks models
    • Fits: DL21740 (model #6387) and DL21741 (model #6388)
  • Sold individually
    • 4 Needed to mount a pair of roller bunks
  • Die-formed of heavy gauge steel plate
  • TUFFPLATE finish
  • Measurement between slotted holes from center to center: 1-1/4"

Zinc plated yellow chromate TUFFPLATE finish has three times the corrosion resistance of standard zinc plated trivalent chrome process and 30 percent greater corrosion resistance when compared to powder coated finish.

Results of lab test using 5 percent neutral salt spray confirms our TUFFPLATE finish provides in excess of 500 hours against First Red Rust and in excess of 100 hours of First White Corrosion.

21742 Roller Bunk Bracket - Universal by Dutton-Lainson Model 6389

Video of Boat Trailer Roller Bunk Bracket for Dutton-Lainson Roller Bunks Parts DL21740 & DL21741

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

Video Transcript for Dutton-Lainson Boat Trailer Roller Bunk Bracket Installation

Today on our boat trailer we're going to review and install the Dutton-Lainson Boat Trailer Roller Bunk Bracket part number DL21742; this is applicable in conjunction with both 4 and 5 foot Dutton-Lainson Roller Bunks part number DL21740 and part number DL21741. To begin our install we're going to remove the old or manufacture's boards and brackets. Since we're removing the bunk boards and brackets we just going to take the u-bolts off the frame. Quick check tip, before you remove your board take a tape measure and get the height of your board. That way when you install your new brackets and rollers you can set it back to the same height. Now that we have the boards lose we'll go ahead and just take them off the trailer and set them aside as they will not be reinstalled. Now for our new rollers we're going to have the Dutton-Lainson Boat Trailer Deluxe Roller Bunks part number DL21741. Now for our new Rollers we're going to install a new bracket to secure it to the trailer.

We're just going to reuse the old manufacturer's u-bolt. Once I have it set in place I'm going to go ahead and tighten it down. Note, for additional security we could add a second set of u-bolts here on the other side. Now here at the center support we're going to have 2 5 foot rollers come in together; we'll need 2 brackets. Both getting attached to the same spot; to do that we'll bring in a u-bolt from each side. This will secure our brackets.

Now I've got my first one in place, the back side here of the center support. We'll get our second u-bolt and support bracket. Now that all our hardware is in place we'll make sure she's in position and then tighten down the u-bolts. Keep in mind when tightening down your u-bolts make sure you tighten them down evenly. Now once we have the center support done we'll go ahead and install our last bracket here at the very end.

It will be the same process for the very first bracket. Now with all our brackets secured we'll go ahead and put our bunk rollers in place. Starting here at the rear set of bunk rollers we'll set it onto the brackets first. Not supplied with the install kit you'll need to add a bolt or bolt and washer for this application that'll go down through your bunk roller then through the bracket. Underneath I'm going to add a flat washer and nut. It's recommended to use nylon lock nuts; this will help prevent the hardware from loosening.

Let's go ahead and install it finger tight this time. Now we got our attachment point in place we'll go ahead and the same process here for the rear attachment point. Next, we're going to install our front bunk and rollers. It'll sit here on our forward and second bracket but because of how close we are oriented to the rear bunk we going to remove the rear set of rollers and we'll need to drill out our attachment point so that we can secure it to the bracket. Let's start with removing the rollers. Using a couple of 3/4 inch sockets we can simply just go ahead and remove the bolt that holds the rollers in place. I'm just going to slide the rollers back onto my bolt, thread that nut back on; that'll hold them together while I set them aside. Now I'll go ahead and put our front bunk in place. Set it in position on the bracket and mark the hole. Now we'll take our bunk back off, we turn it over and drill out the hole. To drill out the hole I'm going to use this small poly bit and then open it up to my final size using the step bit process. We now ready to go ahead and put the bunk back in place, drop in our hardware and secure it. Now with all our hardware in place we'll go ahead and tighten down all our fasteners. Now with one side done we'll do ahead and repeat the same process on the other side. Just like that we've completed the install of the Dutton-Lainson Boat Trailer Roller Bunk Bracket part number DL21742 on our boat trailer.

Customer Satisfaction Score:

Customer Reviews

Boat Trailer Roller Bunk Bracket for Dutton-Lainson Roller Bunks Parts DL21740 & DL21741 - DL21742

Average Customer Rating:  4.5 out of 5 stars   (27 Customer Reviews)

Boat Trailer Roller Bunk Bracket for Dutton-Lainson Roller Bunks


Poor design lifts rollers 2 inches higher than 2x4 bunks. Modified everything and had to throw away u bolts


Had to drill out the rivet and replace it with a bolt/lock nut for a aluminum older boat to fit correct.


To keep the same height as the old boards, the backets would need cut and possibly welded to the frame. I raised the bracket just high enough to install the U-bolts. Now, the rollers will not till as designed. Shouldn't hinder loading and unloading but I will see first time out


I have always been impressed with the quality and timeliness of delivery from etrailer.


5 Ft roller bunk Part DL21741 is a high quality item. It installed in minutes on existing brackets. Boat is approx 3/4” higher than on standard bunks but it shouldn’t be a problem since it rolls on/off effortlessly. I also bought new brackets Part DL21742 thinking they might allow lowering boat a little but they were same as existing brackets so I returned them which was simple. Customer service was excellent.


Heavy duty product.


The brackets are as described but unfortunately given my trailer frame I couldn't mount my roller bunks any lower than the standard bunks. The lowest you can get these brackets is probably almost 4 inches above the frame, then you have to bolt the roller bunks on top of that.


Due to a mix up in shipping....nobody's fault really, another type of bracket was required. The exchange was done without a hassle and the proper part is ready for installation. The product is better than expected but the customer service exceeded any I have ever dealt with anywhere!

Have had these installed and used for a year now....boat loads and launches with ease. Could have saved to much time and more ulcers and stress!!
Austin C - 07/09/2017


I used these brackets with the roller bunks and they made installation a breeze paired with the recommended u-bolts. The system literally went together in less than an hour with minor modifications I opted to make. I cannot wait to pick up my new boat and put them to the test.


I purchased these about a year ago and again just a few days ago. Used these on a boat I sold and then just bought 4 to set up my buddies boat with roller bunks. Very strong and sturdy bracket, works with the roller bunks great.


used 5 & 4 ft. Deluxe roller bunks. on boat trailer, easy install and boat rolls off trailer very easily. Great product!! Boat is much easier to launch and load.


The brackets for the roller bunks worked out just fine.


Used these as part of a full boat trailer rebuild. They were sized perfectly and of very high quality. After a year of use these are performing excellently.


Product was of excellent quality, Very easy to install, and worked most excellent.
This is the perfect product to make life easier to load and unload your boat.


Great product and easy to install, supports roller bunks perfectly


Great item, great/fast service! I will remember your site for any future trailer repairs - thanks!




made mounting easy


They look a little thin but we will see. I have not installed them as of yet. I hope they dont bend.


The stuff is failing wish I had not bought it


Got it when you said it would arrive . Looks like a well made product .

Thank you


product was eaqsy to install on my trailer. They held the weight load of the boat excellent. Im now ready to go fishing..Thanks alot.


much heavier than expected. good value. will carry huge weight


The product was just as described. In new condition and packaged in a adequate box for delivery.


More better than I thought.

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