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5/16-18 x 1 1/4 Flat Head Floorboard Thread Cutting Screws (100 pcs) Type F, (Star - Six Lobe Drive), Black Phosphate Finish, Countersunk, T-40 Drive (Carton: 100pcs) Alloy Steel

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$34.99

$ 17 .99 $17.99

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About this item

  • Floor board screws are specially designed for installing wood floors into truck trailers
  • Six-Lobe Recess Flat Heads (Floorboard)
  • Self Tapping Thread Cutting Screws - Measure length from the top of the head to the tip
  • Black Phosphate and Oil Finish. The oil serves as a rust inhibitor and a lubricant
  • The head design of Floorboard Screws provide a flush surface in countersunk holes. For this reason, they are perfect in floorboard fastening applications.



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

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