2-1/2" Long Torx Trailer Floor and Wall Liner Screw for ACQ Treated Wood

Part Number: TFX250ACQ

In Stock

$2.49

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Torx flathead screws make securing a wood floor to your trailer quick, easy and economical with a 1/4" diameter and type F points for heavy-gauge sheet metal. Specially designed for use on Alkaline Copper Quaternary wood. 1-800-940-8924 to order Redline accessories and parts part number TFX250ACQ or order online at etrailer.com. Free expert support on all Redline products. Great prices and Fastest Shipping for 2-1/2" Long Torx Trailer Floor and Wall Liner Screw for ACQ Treated Wood. Accessories and Parts reviews from real customers.

Redline Accessories and Parts - TFX250ACQ

Features:

Tapered flathead sits flush with surface
End of screw has a blunt tip with multiple cutting surfaces

Specs:

1/4" diameter
2-1/2" long
21 threads per inch
Type F point
Requires 7/32" pilot hole

Because Alkaline Copper Quaternary (ACQ) treated wood is very corrosive, these screws have been made with an approved plating material that is less expensive than stainless steel and has been shown to outperform galvanized screws.

TFX250ACQ, Screw For Treated Wood 1/4" x 2-1/2" Self-Tap

TFX250ACQ 2-1/2" Long Torx Trailer Floor and Wall Liner Screw for ACQ Treated Wood

Video of 2-1/2" Long Torx Trailer Floor and Wall Liner Screw for ACQ Treated Wood

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

Video Demo Redline Accessories and Parts TFX250ACQ

Redline Tie Down Anchors TFX250ACQ Review

Video Transcript for Redline Tie Down Anchors TFX250ACQ Review

Today we're going to review the 2 1/2 inch long torch trailer floor and wall liner screw for ACQ treated wood. Now the torque's flat head screws make securing a wood floor or a wall liner to your trailer quick, easy and economical. The screw uses a type F point, which is designed for securing your wood floor or your wall liner to heavy gauge sheet metal. Now these screws are specifically designed for use on the ACQ, which is the alkaline copper quantinary wood. This is because this ACQ is a treated wood. It's very corrosive. These screws have been made with an approved plating material that is less expensive than using stainless steel screws and has been shows to outperform galvanized screws. If you notice has the tapered flat head, which will sit flush with the surface when they're installed.

The torque's head size is a T30. The diameter of this screw is a quarter inch. The overall length, if you put a ruler on it, you can see is going to be right at 2 1/2 inches long. We had mentioned it uses a type F point and what that is it has a blunt tip and as I rotate it, is if you look at the very end, it has multiple cutting surfaces. Now when you do install this, it does require drilling a 7/32 pilot hole. That should do it for the review of the 2 1/2 inch long torques trailer floor and wall liner screw for ACQ treated wood..

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4.9

224 reviews

5 Stars		(201)
4 Stars		(17)
3 Stars		(5)
2 Stars		(0)
1 Star		(1)

by: Dann 09/30/2026

The good stuff! Perfect. None broke or stripped on install - pilot holes make it easy. Great grip and easy penetration. Pay the extra for the do-it-right product.

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Christopher H.

10/1/2026

The trailer looks great Dann! Thanks for including the photo.

by: Tony 08/27/2025

Predrilled 7/32 hole into angle iron.. Screws went right in. If you're replacing deck on your trailer. This is the only way to go !!!

Tony One Year Later

9/1/2026

Great !!! very happy with the product !!!

Heather A.

9/1/2026

@Tony Love to hear that Tony! How's the deck holding up?

by: Bill M 10/13/2017

By far the best screws that I have ever used and are well worth the money. I looked at other screws to use with treated lumber and not only did they look inferior they cost more. The combination of the screws and the drive bit are definitely a wining combination.

I highly recommend purchasing the Torx driver bit at the same time. Not a "cheap" product. I installed 170+ screws thru 3/16 cross members (after using a 7/32 bit for the pilot hole) and the bit shows very little wear. I highly recommend both of these products.

On a side note. The web site exceeded my expectations for information. I called the customer service desk with a question and received the info that I was looking for. Then they followed it up an email. Best online company that I have worked with. Will definitely recommend to others. Thanks, Bill M.

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Bill M. One Year Later

10/13/2018

Everything is great. None to very little cupping of the treated 2 x 8s. Shrinkage of the boards was about what I expected. Still very happy with the screws and the bit. I have recommended both products to others that are thinking about redecking their trailers.

by: JB 01/14/2022

Exactly what was needed before installing the torx screws into the trailer frame. The only issue was that the old screws did not come out; had to take those off even with the frame using an angle grinder and cut-off wheel. Twice, while drilling, I ran into what was left of the old bolts. One of those trips snapped off the end of the bit. Otherwise, no issues, and I'm glad I had two drill bits (to install 32 screws).

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Jb One Year Later

1/21/2023

Installation was easy, and after staining my trailer deck and repainting the frame I have a trailer that is better put together than the original. Those screws hold the boards tight to the frame, and have shown no sigh yet of loosening or rusting.

by: David 08/29/2025

I did a complete rebuild of my trailer. These screws worked perfectly as described with the suggested pilot hole bit.

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by: John M. 08/24/2019

From start to finish etrailer has been great to do business with. Start with a clean surface, measure twice cut once, and drill for every screw...all went in like butter no screws damaged. We never redecked a trailer before, will do them all in house going forward. Two guys 4 hrs (includes breakfast and a lumber run). Couldn’t be happier.

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John M. One Year Later

8/25/2020

Its been a year...two trailer hauling mowers, a BX25d, probably over 100tons of gravel-2-3tons per load, scrap metal runs, trash hauling and no popped screw all boards are holding just fine...great products!!! Buy them you will be happy! I am??

by: Teena Newman 02/18/2026

I recently purchased this trailer floor screw, in quantity 300, to replace rusted, broken screws in an older model 48' flatbed trailer, that was modified to serve as a bridge over a 3-acre lake dam. After much research, I feel this product was the best option & made of superior material. This company was great to deal with. Shipping was prompt. Would highly recommend!

by: Jon 06/20/2022

used these with dewalt 1/4inch impact after drilling recommended pilot holes to redo my atv trailer. none broke. excellent fasteners

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Jon One Year Later

6/21/2023

no issues with breakage or pulling out after a year of use

by: John 02/05/2018

I just finished putting the floor onto my trailer and not one of these screws broke during the process. In fact, I am placing an order for 100 more of them to have in my garage. Thanks for a great product.

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by: Dustin B 01/20/2017 One Year Later

This is an excellent product. This is the only way I will fasten down trailer decking material. Simple installation and great return in the investment.

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by: Paul C 08/14/2017

I have purchased these in different lengths. I just built a 6 X 9 utility trailer. Not only are these the best price, they are by FAR the best quality I have used. Not one broke or stripped.
Cheap Chinese copies either snap off, or the threads strip out. I was putting them thru 1/8" wall tubing. No problem at all.
Also, it is important to note that the coating on these allows them to be used in virtually any type of wood. AC2, ACQ, Oak (many people don't realize how acidic Oak is), and others.
I really have nothing but the best marks for them.

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by: Gopher Baroque 07/01/2017 One Year Later

These are the right length for attaching rough-cut decking to flat bed. Galvanizing has been holding up fine for a year or so, admitting truck is parked under carport most of the time. Socket head does not chew out driving it snug with manual driver.

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by: Terry S. 09/27/2012

I even had time to track the shipment. Just as I ordered and quick. I'm a loyal customer now.

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by: Brandon 04/28/2026

Expensive, but the right tool for the job

by: Jerry K 09/08/2020 One Year Later

Great product, took my time, drilled pilot holes, broke no screws!

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Jerry K. One Year Later

9/9/2021

Holding strong, great product!

by: Max 12/06/2017

This was a great product and exactly what I was searching for. I needed a strong deck board screw that was strong and resistant to the corrosive properties of treated lumber. The screw did wonderful in its self tapping property. I only broke 1 of the 126 I installed in my trailer and that was because I drilled a sloppy hole beside a broken screw from the previous install. The screw tapped the metal easy enough that I was able to use cordless drills to install. Also the price was very reasonable and this is comparing it to screws that had a plain or zinc finish. Shipping was very fast and I used the free shipping option.

Max One Year Later

12/6/2018

still pleased with this purchase. My trailer sits out and the screws are still holding strong. there is some fadingon the head. It appears this screw will outlast the wood. If it does, I will refloor my trailer and order these screws to install it again

by: Aaron R 04/29/2016

You need them get them going to use them to redo trailer decking Thanks

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by: Charles M 09/16/2018 One Year Later

Great product. I used 170 to re-deck my 8 x 16' flatbed trailer. I pre-drilled the pressure treated lumber and drilled pilot holes in the 3/16 cross members. I used my 1/2" angle head drill to install the screws as it turns at a slower rpm and still has the torque to drive them thru the 3/16 steel. I purchase the torx head bits (2) at the same time. I only used one bit and it still looks like new. Highly recommend both products.

Bill M. One Year Later

9/16/2019

I have used used the same bit on other projects and still works great.

by: Dave D 07/01/2015

Received the screws today. Right on time as ordered. I installed them right away. They work great! I ordered a few extra incase some stripped or would have problems with installation. I recently purchased a new Gooseneck trailer and it only had screws every 3rd cross member. I screwed every row now.
Well, now I have a few extra. They were easy to use. I did dip them into oil and they cut the threads very easy. Will contact again if I ever need more.

David D. One Year Later

6/30/2016

Exactly as expected. Highly recommend.

by: Sven C. 12/28/2016 One Year Later

TFX250ACQ trailer floor screw. Great product. I used the screws to re-deck a flatbed trailer that was in desperate need of new wood on the deck.
Thanks etrailer.com !

Sven C. One Year Later

12/28/2017

The screws are holding up very well. No issues. I highly recommend these screws.

by: John C. 10/12/2016

Rain is keeping me from starting my project of a new trailer deck, but the product was perfect on a test sample. Shipping was super fast. Bought a new DeWalt impact driver to install them and can't wait to get started. I was sold after reading all the positive reviews so thanks to all of you who posted comments.

John C. One Year Later

10/12/2017

The installation is still solid as a rock. This product was absolutely the best choice for my job.

by: Elwyn V 10/21/2016

The product was of good quality and worked great for my project. These screws are hard to find and they had just what I needed.

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by: Glen K 07/14/2016

These screws work perfect when replacing the wooden deck on my 18' Car Trailer. I also used the used the recommended Torx bit offered by Etrailer, and installed about 150 screws with the same bit...not a single one broke or stripped. The only problem I found was, a previous post recommended using a 7/32" drill bit, but I found that to be too small for my application; it just wouldn't allow the screw to proceed thru the steel on my trailer. I had to step up to a 15/64" bit in order to get the screw to actually work.

by: Steve K 11/24/2016

I was glad to find etrailer because I could not find the item I needed anywhere locally. This was a pretty simple purchase - I needed and bought the Torx trailer screws to use in replacing the deteriorated wooden deck on my old trailer. These screws are functionally the same as what were originally used to assemble the trailer, but those original ones were all badly rusted and unsalvageable. The ones I bought from etrailer work just as expected and are the best way to attach the 2x8 treated wood decking to the frame.

Ordering from etrailer was easy and they have an excellent assortment of products. Delivery was quick. I will in all likelihood use them whenever I again need trailer components.

by: Cory 12/30/2018 One Year Later

I used the recommended drill bits purchased from Etrailer (which all snapped), yet almost 50% of the screws broke off and I had to cut them off and try again. All of the screws that I did eventually get in have held the decking for my flatbed to the metal frame very securely. In the end they performed advertised

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Do You Carry a Galvanized Screw 5/16" Diameter and 2 1/2" Long?
Hello Lewis, We do not have any in the 5/16, they are all 1/4". The 2-1/2" Long Torx Trailer Floor and Wall Liner Screw for ACQ Treated Wood # TFX250ACQ is the closest thing we have, it gives you the 2 1/2" you are looking for but is 1/4" diameter. The # TFX250ACQ is designed specifically for use with ACQ-treated wood, which makes it a great pick for outdoor or trailer flooring projects where corrosion is a concern. It's made of steel with a special coating that holds up better than standard...
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Recommendation for Re-Using Deck Board Screw Holes When Replacing Wood on Trailer
It would be a good idea to go with different holes for the reinstallation of the deck boards on your trailer, or at least enlarge the ones you have and then go with the next thicker screws so that you know you are getting a good grip on the metal with the new screws.
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Torx Bit Needed For The Torx Trailer Floor and Wall Liner Screw for ACQ Treated Wood # TFX250ACQ
Hey Brian, The 2-1/2" Long Torx Trailer Floor and Wall Liner Screw for ACQ Treated Wood # TFX250ACQ takes a T30 Torx bit # TX430-1.
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How Many Threads Per Inch Does the 2-1/2" Long Torx Trailer Floor and Wall Liner Screw Have?
Hey Mike. I checked with the manufacturer and the 2-1/2" Long Torx Trailer Floor and Wall Liner Screw for ACQ Treated Wood item # TFX250ACQ does have 21 threads per inch. These screws are specially designed for use on Alkaline Copper Quaternary wood. They have a blunt tip so you'll want to drill a 7/32" pilot hole. You'll need a TRX 30 bit to install them like our Torx Head Screwdriver Bit item # TX430-1. Are you looking to replace screws in your trailer floors or are you swapping out...
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How Many Screws Are Included with the 2-1/2" Long Torx Trailer Floor and Wall Liner Screw
The 2-1/2" Long Torx Trailer Floor and Wall Liner Screw # TFX250ACQ is sold individually and not by the box. So you would just need to purchase however many you are needing.
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Torx Screws For Replacing 2x6 Boards On Big Tex Utility Trailer
The longer 2-1/2" torx screw Item # TFX250ACQ will work the best to attach the boards to the metal frame of your Big Tex trailer when replacing the trailer deck. If you need a torx head screwdriver bit, you can use part # TX430-1.
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Fasteners for Install of Erickson E-Track Wheel Chock
The 2-1/2" Long Torx Trailer Floor and Wall Liner Screw # TFX250ACQ could be used to secure e track wheel chock like the part # EM09160 but it would not be your most ideal solution since this is designed to secure wood to metal. You are wanting to secure metal to wood so using carriage bolts, nuts, and washers will give you the most ideal and secure way to attach the # EM09160.
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Coating on the Redline 2-1/2" Long Torx Trailer Floor and Wall Liner Screw # TFX250ACQ
I spoke with my contact at Redline who said that the 2-1/2" Long Torx Trailer Floor and Wall Liner Screw for ACQ Treated Wood # TFX250ACQ actually has a coating of Alkaline Copper Quaternary on it. This gives it superior resistance to any corrosion that would take place when it is used with treated wood (including ACQ). Since both the black phosphate hardened oil based finish coating you mentioned and the ACQ coating are comparable when it comes to resisting the elements, I believe that...
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Are the 2-1/2" Long Torx Trailer Floor and Wall Liner Screws for ACQ Treated Wood Sold Individually
The 2-1/2" Long Torx Trailer Floor and Wall Liner Screw for ACQ Treated Wood part # TFX250ACQ are sold individually. The cost is a reflection of the compatibility with Alkaline Copper Quaternary (ACQ) treated wood. If you just have standard treated wood you can use the 2-1/2" Long Standard Torx Trailer Floor and Wall Liner Screw part # TFX250. Don't forget the torx bit, part # TX430-1.
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Which Torx Trailer Deck Screws for 2 x 6 Floor Boards
Since a 2x6 board is about 1-1/2 inches thick, I don't think using 1-1/2" Long Torx Trailer Floor and Wall Liner Screw for ACQ Treated Wood # TFX150ACQ is going to provide sufficient contact with the trailer frame. For that reason I recommend going with the 2-1/4" # TFX225ACQ or 2-1/2" long # TFX250ACQ, which will give you enough screw to install into the steel. You will still want to drill pilot holes for this application, as you've noted.
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Recommended Deck Screws to be Used On 1" x 6" Wood for an Aluminum Trailer
To secure your 1"x6" deck boards to your aluminum trailer, I recommend using the 2-1/2" Long Torx Trailer Floor and Wall Liner Screw for ACQ Treated Wood # TFX250ACQ. These screws are going to be able to be used on your aluminum trailer, will sit flush with the wood when screwed in, and measures 2-1/2" long with 21 TPI.
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What is the Mounting Hole Size on E-Track
The mounting holes on the E-Track such as # E19148 are 1/4 inch in diameter. The type and length fastener you use will depend on the surface material and thickness you are attaching it to. For example if your surface was ACQ treated wood you could use # TFX250ACQ which is 2-1/2 inches long.
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How Big are Mounting Holes on E-Track
The mounting holes on the E-Track such as # E19147 are 1/4 inch in diameter. The type and length fastener you should use will depend on the surface material and thickness you are attaching it to. For example, if the surface was ACQ treated wood you could use # TFX250ACQ which is 2-1/2 inches long.
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Which Trailer Floor and Wall Screws are the Best Recommendation for Rust Resistance
I would recommend to use the treated torx screws for ACQ treated wood for better corrosion and rust resistance. The treated torx screws like the Redline 2-1/2 Inch Long Torx Trailer Screw for ACQ Treated Wood, part # TFX250ACQ, are plated with a material that will resist the ACQ preservative which is very corrosive because of the high levels of copper it contains. When using ACQ timber it is necessary to use double-galvanized or stainless steel fasteners. The plating material used on...
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Recommended Trailer Floor Screws for Attaching 1 Inch Decking Boards to 3/16 Inch Steel Angle Iron
As long as you have a pilot hole the screw threads will be strong enough to withstand threading through the angle iron. You should be fine with the 1-1/2 inch screws like # TFX150ACQ you were looking at. For your setup the 1-1/2 will be sufficiant but you can also go with the longer 2-1/4 inch screws # TFX250ACQ. Both of these will work but you will just have more screw poking through on the other end with the longer ones. Since you are attaching treated wood to your trailer, I recommend...
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Do 2-1/2" Long Torx Screws Come in Package of 40?
The 2-1/2" Long Torx Trailer Floor and Wall Liner Screw for ACQ Treated Wood # TFX250ACQ is not the same screw that comes in the package of 40, which is part # TF01250. The 40 screws in # TF01250 are not designed specifically for use on ACQ (Alkaline Copper Quaternary) wood.
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Screw Recommendation for Securing E-Track to Metal Plate Under Trailer Floor
That is going to depend on the thickness of the floor on your cargo trailer. I attached a link to a page that has all of the self tapping screws you could use for E-tracks. You will want to select the length you need from the filters on the page and the correct length screws would be listed. There are screws from 1 inch to 2-1/2 inches in length like the # TFX250ACQ.
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Head Diameter of 2-1/2" Long Torx Trailer Floor
The head diameter is 7/16" for both the 2-1/2" Long Torx Trailer Floor and Wall Liner Screw for ACQ Treated Wood # TFX250ACQ and 2-1/2" Long Torx Floor Screws, 40/Pkg # TF01250. For a bit you can use the Torx Head Screwdriver Bit # TX430-1.
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Recommended Screws to Attach Waterproofed Plywood Flooring to a Galvanized Trailer Frame
To attach your flooring to your galvanized boat trailer, I would use the 2-1/2" Long Torx Trailer Floor and Wall Liner Screw for ACQ Treated Wood # TFX250ACQ. These screws have been made with an approved plating material that is less expensive than stainless steel and has been shown to outperform galvanized screws.
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Troubleshooting Trailer Deck Screws that are Breaking
If the screws part # TFX250ACQ are breaking that would indicate that they are corroded and seized up in the metal they are attaching to. So what you could do is take some spray lube to them where they attach to the metal and let that soak to see if that helps. Applying heat to the bolts too can help free them up as well.
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Drill Bit for 2-1/2" Long Torx Trailer Floor and Wall Liner Screw for ACQ Treated Wood
You can use the TRX 30 Bit # TX430-1 for the 2-1/2" Long Torx Trailer Floor and Wall Liner Screw for ACQ Treated Wood # TFX250ACQ. You should also be able to acquire a bit this size at your local hardware or home improvement store.
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What Drill Bit Should be Used for the 2-1/2 Long Torx Screw # TFX250ACQ
I would go ahead and use the same holes that are already on your trailer. just make sure that they are the 7/32" diameter needed for the 2-1/2" Long Torx Screw # TFX250ACQ and that they have a good grip. If the screws don't seem to hold very well then you'll want to go with different locations or larger screws. When it comes to what type of drill bit we don't really have a recommendation. Since every application is different it is really up to the customer's discretion. The Torx Head...
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Wood Screws to Use with White Oak Boards
Torx screw # TFX250ACQ is an excellent option for treated wood. If the white oak you have is ACQ treated lumber then this would be the ideal screw. Otherwise I would go with stainless steel hardware which does cost more but in terms of corrosion resistance there's nothing better than stainless! We have a stainless screw, # 1172904, that will work with wood but it is only a 1/2 inch long. If you go with the Torx screws and need a bit use # TX430-1. In either case when you use screws in...
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Do Trailer Floor and Wall Liner Screw for ACQ Treated Wood Have Corrosion Resistance
The 2-1/2" Long Torx Trailer Floor and Wall Liner Screw for ACQ Treated Wood # TFX250ACQ are absolutely better than standard deck screws for resisting corrosion. In fact, these screws are made with a plating material designed specifically to be more resistant to corrosion than even a galvanized screw. I have added a link to a video review of these screws for you to check out as well.
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