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1/4-20 x 2 1/2 Flat Head Floorboard Thread Cutting Screws, Type F, (Star - Six Lobe - Torx Drive), Black Phosphate Finish, Countersunk, T-30 Drive (Carton: 100pcs) Alloy Steel

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$19.90

$ 9 .99 $9.99

In Stock

1.:1/2-13 X 1 1/2 Inch


2.Item Package Quantity:10


About this item

  • SELF TAPPING TRAILER DECK SCREWS - Designed specifically for attaching wood floors into truck trailers, but they can be used in a number of different applications such as those involving fastening to heavy gauge sheet metal, aluminum, castings, cast iron, brass, and plastic.
  • MATERIAL - Hardened Steel (RC 45 Minimum Case Hardness) | BLACK PHOSPHATE & OIL COATING - Provides corrosion Resistance
  • Contractors & Builders – Ideal for securing wooden or metal floorboards to metal framing or subfloors. Automotive Industry – Used in vehicle floorboard installations and repairs. Manufacturers & Industrial Workers – Common in furniture, machinery, and equipment assembly. DIY Enthusiasts & Homeowners – Great for home renovations and flooring repairs.
  • RECOMMENDED PLATE THICKNESS - .247 inches- .253 inches | RECOMMENDED HOLE SIZE - .228 inches (#1 Drill Bit Size)
  • The head design of Floorboard Screws provide a flush surface in countersunk holes. For this reason, they are perfect in floorboard fastening applications. The star drive provides better grip and less slippage compared to other drive types, allowing for easier and more efficient installation.
  • Floorboard Thread Cutting Screws – Steel, Black Phosphate, Flat Countersunk Head, Type F Point, Star Drive T-25 – Self-Threading Screws for Wood & Metal – Heavy-Duty Fasteners (Pack of 100)
  • Engineered for professionals, trusted by builders. Our screws are rigorously tested for durability and performance
  • Flat Countersunk Head – Flush fit for a clean finish + STAR DRIVE T-25 FOR HIGH TORQUE – Reduces cam-out and stripping, allowing for a more efficient and secure fastening.
  • DURABLE STEEL CONSTRUCTION – Made from high-strength steel, ensuring maximum durability and load-bearing capability.
  • SELF-THREADING DESIGN – Featuring a Type F point, these screws cut their own threads, eliminating the need for pre-drilling and speeding up installation.



Product Description

Industry Leading Trailer Decking Screws

Heavy-Duty Construction – Built for securing trailer decking and flooring with high-strength materials.

Upgrade your trailer decking with our premium trailer decking screws, made from high-strength steel with a black phosphate finish for superior durability. Featuring a flat countersunk head, these screws sit flush for a clean and professional look. The Type F thread-cutting point allows for secure installation into wood-to-metal applications, making them ideal for trailer floors, truck beds, and utility trailers. Engineered for heavy-duty performance!

Perfect for securing plywood trailer decking, flatbeds, cargo trailers, and more, these screws offer maximum holding power to keep your trailer floor secure for the long haul.

Flat Countersunk Head

Sits flush with trailer decking for a smooth, professional installation.

Heavy-Duty Trailer Deck Screws

Built for trailers, truck beds, utility trailers, and flatbed flooring.

Steel Construction with Black Phosphate Finish

  • Strong, durable, and resistant to corrosion in dry environments.
  • Strong Thread Engagement
  • Ideal for Wood to Metal Trailer Floors

Type F Thread-Cutting Screws

What They Are and Why Use Them?

A Type F point is a thread-cutting screw designed specifically for wood-to-metal and metal-to-metal applications. Unlike self-drilling screws that have a drill tip, Type F screws require a pre-drilled hole before installation. Once inserted, the cutting edges of the screw create their own threads as they engage with the material.

Advantages of Type F Screws

  • The cutting edges on the tip allow the screw to form threads in thin metal, aluminum, and steel structures.
  • Ideal for attaching wood planks to metal trailer frames or similar wood-to-metal fastening applications.

Stronger Holding Power

  • Since these screws cut their own threads, they provide a tighter grip and more secure fastening than traditional screws.
  • Prevents loosening over time, making them ideal for trailer decking, where vibration and movement are common.

Common Uses for Type F Screws

  • Trailer Decking
  • Automotive & Truck Body Applications
  • HVAC & Sheet Metal Work
  • Furniture & Cabinetry Assembly
  • Two Cutting Edges on Point to Create Threads

Robin Bedwell
Reviewed in the United States on March 1, 2025
Worked great for my trailer deck.
ArmySFCRet
Reviewed in the United States on January 31, 2025
Replaced decking on car hauler. Replaced treated pine with oiled Douglas Fir. Increased size of fasteners from 1/4 inch to 5/16th. Predrilled holes just under 5/16th. Easy install.
Stu
Reviewed in the United States on January 1, 2025
I used these to attach the e-track through the plywood and to the steel frame of my trailer. 100 was more than enough.I also used"50 PCS #14 x 2 Sheet Metal Screws, Black Hex Washer Head Self Drilling Screw, Flanged Hex Self Tapping Screws, 410 Stainless Steel, Hex Bit Socket Included"to screw the e-track to the the plywood, where there was no underlying steel anchor point.I only bought one pack of those (50 pieces), but a second was needed to finish the job right.Worked well.
Antonio Castagna
Reviewed in Canada on September 19, 2024
Exactly as described, easy to use and work well
Go with the Flow
Reviewed in the United States on December 3, 2024
Excellent self threading screws, as long as a 1/8 inch or 3/26 inch pilot hole is drilled first. But great self threading
Pueo W.
Reviewed in the United States on December 20, 2024
none broke screwing them in 1/4’ steel
joe b.
Reviewed in the United States on October 28, 2024
A very useful and Universal screw
ToolmanJohn
Reviewed in the United States on September 1, 2023
Need to replace about 100 bolts in a toy hauler trailer. It has Logistic L-Track aka airline track for tie down locations. the OE installed undercut flat head screws are having heads breaking/pooping off!! Already had 6 broken bolts like this! I had to use a drill and broken screw extractor to get the broken self tappers out. A real chore!! They are way to tight! But the new screws look great, these are not undercut, but "self drilling" and the threaded hole is already there in the floor, so these are installing easily. TORX is the way to go on fasteners! Better than hex head and FAR better than Phillips (all my L-Track is installed with Phillips).. Happy to replace all of them over time.
Thaddeus King
Reviewed in Canada on July 13, 2023
The screws preformed as expected.
Shabbir Ahmad
Reviewed in Canada on November 9, 2023
these were exactly what was in descriptions.
Morgan Huffman
Reviewed in the United States on November 24, 2023
Considering the cost of these compared to what was locally available, I’ll buy these again. Only stripped a couple of them at the start, upsized my pilot bit and they worked fine. Cutting oil and proper pilot hole sizes are the key, will purchase again on my next trailer deck project.
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