Washer Head Screws - Truss Head Wood Screws with Torx Drive

Washer head screws, also called truss head wood screws, feature a wide, low-profile rounded head that provides greater bearing surface than a standard flat or bugle head screw. This makes washer head screws ideal for applications where pulling through the material is a concern - siding, thin panels, cabinetry face frames, furniture, and trim work.

Frequently Asked Questions

What are washer head screws used for?

Washer head (truss head) screws are used when you need a wide, flat bearing surface, common in cabinetry, siding, thin wood panels, and furniture. The large head prevents the screw from pulling through the material.

What is the difference between a washer head and a flat head screw?

A flat head screw is countersunk and designed to sit flush with or below the surface. A washer head (truss head) screw has a large rounded head that sits on top of the material, providing a wide clamping footprint.

Can washer head screws be used for exterior siding?

Yes. Exterior-coated washer head screws are commonly used for siding, trim, and outdoor furniture applications. The wide head grips siding panels securely without tearing through.

What is the difference between a truss head and a washer head screw?

Truss head and washer head are often used interchangeably for the same wide, low-profile round head style. Some manufacturers use one term exclusively; others use both. They refer to the same screw head geometry.

Are washer head screws self-drilling?

Some washer head screws include a drill-point tip for metal or deck applications. Our standard washer head wood screws have a sharp point for driving into wood without pre-drilling in most softwood applications.

What drive type do washer head screws use?

Our washer head screws use a Torx star drive. The torx geometry provides superior cam-out resistance compared to Phillips drive, which is important when applying the moderate torque needed for siding and panel fastening.

What material are the washer head screws coated with?

Our washer head screws have an exterior polymer coating that provides corrosion resistance for outdoor applications. The coating meets requirements for use with most exterior building materials.

How do washer head screws compare to pan head screws?

Washer head screws have a wider head diameter than pan head screws, giving more bearing surface and better pullout resistance in sheet goods and siding. Pan head screws are more compact and better suited for metal-to-metal applications.

Can I use washer head screws for composite decking?

For composite decking face screwing, a small plug-head or trim head screw is typically preferred for appearance. However, washer head screws are suitable for hidden or structural composite decking fastening applications.

What length washer head screws do I need for siding?

For 3/8 inch or 1/2 inch lap siding over OSB or wood sheathing, 1-5/8 to 2 inch washer head screws provide adequate penetration into the framing. Always ensure the screw reaches at least 1 inch into the stud or sheathing beneath.