The Ultimate Guide To Headlok Screw Sizes

headlok screw sizes

HeadLOK is a heavy-duty wood screw with a flat head and an internal drive. It offers higher design shear than 3/8 lag screws and requires no pre-drilling. HeadLOK screws are available in various sizes, including 2-7/8, 4-1/2, and 6 lengths, and come in packs of 12, 50, 250, and 500. They are ideal for heavy-duty wood construction tasks such as deck framing, stair framing, fences, and cabinets.

Characteristics Values
Head Style Flat Head
Drive Style Internal Drive, Spider Drive
Required Pre-Drilling No
Design Shear Higher than 3/8" lag screws
Finish Black Coating
Compliance ACQ-approved, ICC-compliant
Corrosion Resistance High
Applications Deck Framing, Stair Framing, Attaching Rigid Foam (SIPs), Fences, Kitchen Cabinets
Lengths 2-7/8", 4-1/2", 6"
Pack Sizes 12, 50, 250, 500

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HeadLOK screw lengths

HeadLOK Structural Wood Screws are heavy-duty flat-head fasteners designed for heavy-duty wood construction tasks. They are available in a range of lengths, including:

2-7/8" (2.875")

The FastenMaster OMG-FMHLGM278-50 HeadLOK screws are 2-7/8" long and come in a pack of 50. They are designed to replace 3/8" lag bolts and offer higher design shear values. They are corrosion-resistant and come with a free Spider Driver bit.

4-1/2" (4.5")

The FastenMaster HeadLOK Structural Wood Screws are available in a 4-1/2" length and come in a pack of 50. They are heavy-duty flat-headed wood screws that are black in colour.

6"

The FastenMaster OMG-FMHLGM006-50 HeadLOK screws are 6" long and come in a pack of 50. They are designed for wood-to-wood applications and feature a wafer-style head with a Spider drive.

It is worth noting that HeadLOK screws are not designed for use within 1,000 feet of saltwater applications.

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HeadLOK vs TimberLOK screws

HeadLOK and TimberLOK are two types of structural wood screws designed for heavy-duty construction tasks. They are both part of the FastenMaster LOK Line, which offers exceptional strength and durability, replacing traditional bolts with faster and easier installations. Here is a detailed comparison between the two:

HeadLOK: The Versatile Powerhouse

HeadLOK is a versatile wood screw that can be used for a wide range of applications, including structural insulated panel construction, deck framing, stair stringers, and hanging cabinets. It offers higher design shear values than 3/8" lag screws and does not require pre-drilling, even in dense woods. Its sharp gimlet point and deep-thread design provide fast installations with exceptional holding and withdrawal strength. HeadLOK's flat non-countersinking head and SpiderDrive recess ensure a secure, robust connection with a low-profile appearance. It is corrosion-resistant and ACQ approved for exterior projects, meeting the current ICC standards.

TimberLOK: The Heavy-Duty Champ

TimberLOK is a heavy-duty wood screw that replaces 3/8" lag screws and delivers on a range of applications. It is commonly used for attaching rafters or trusses to the top plate, landscape timbers, decks, fences, headers, and stair stringers. TimberLOK screws come in various lengths, making them suitable for different project schedules. They feature a countersinking head that ensures a flush finish. Like HeadLOK, TimberLOK screws are high-quality, rigorously tested, and code-approved, providing structural integrity and work and cost efficiency.

Key Differences:

The main difference between HeadLOK and TimberLOK screws lies in their head styles. HeadLOK has a flat head that sits flush on the surface of the board, while TimberLOK has a hex head that countersinks into the board. TimberLOK is also better suited for attaching heavy decks to wooden structures, while HeadLOK excels in a wider range of wood-to-wood applications.

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HeadLOK screw features

Sharp gimlet point

The sharp gimlet point enables fast, one-step installation into wood and oriented strand board (OSB).

Aggressive thread

The 2-inch thread provides superior holding and withdrawal strength.

Spider Drive design

The Spider Drive design offers eight points of contact, reducing the potential of stripping. The Spider Drive bit is included with the purchase of HeadLOK screws.

Wafer head

The wafer head eliminates the need for a washer and offers increased pull-through strength.

Self-drilling

HeadLOK screws are self-drilling for most applications.

Low-profile head

The low-profile head does not "Telegraph" through the cover layer.

Chamfer under the head

The chamfer under the head provides increased strength.

Corrosion-resistant

HeadLOK screws are highly corrosion-resistant and guaranteed not to rust or corrode for the life of the project. They are not intended for use within 1,000 feet of saltwater applications.

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HeadLOK screw benefits

HeadLOK screws are heavy-duty flat-head wood screws designed for heavy-duty wood construction tasks. They offer several benefits over traditional bolts and other types of screws:

No Pre-Drilling Required

HeadLOK screws can be installed without pre-drilling, saving time and effort. This is due to their sharp gimlet point, which allows for fast, one-step installation into wood and oriented strand board (OSB).

Higher Design Shear

HeadLOK screws offer higher design shear than 3/8" lag screws, providing increased holding and withdrawal strength. This makes them ideal for applications such as deck framing, stair framing, fences, and cabinets.

Spider Drive Design

The Spider Drive design provides 8 points of contact, reducing the potential of stripping. The Spiderdrive also offers great bit engagement, ensuring a secure connection.

Wide Head

The wide head of the HeadLOK screw eliminates the need for a washer. It provides increased loads and pull-through strength, ensuring a strong and durable connection.

Corrosion Resistance

HeadLOK screws are highly corrosion-resistant, making them suitable for both pressure-treated and exterior applications. They are guaranteed not to rust or corrode for the life of the project, although they are not recommended for saltwater applications.

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HeadLOK screw installation

HeadLOK Structural Wood Screws are heavy-duty screws designed for wood construction tasks. They are self-drilling and require no pre-drilling, offering higher design shear than 3/8" lag screws. The screws feature a sharp gimlet point for fast installation, an aggressive 2" thread for holding strength, and a Spider Drive design that provides 8 points of contact, reducing the risk of stripping.

  • Ensure you have the correct size and length of HeadLOK screws for your project. HeadLOK screws are available in various lengths, including 2-7/8 inches, 4-1/2 inches, and 6 inches.
  • Gather the necessary tools, including a high-torque, 1/2" variable speed drill (18V if cordless) and the Spider Drive bit that comes with the purchase of HeadLOK screws.
  • Prepare the wood surface by checking the end and edge distances. HeadLOK screws do not require predrilling when proper end and edge distances are maintained.
  • Using the drill, drive the HeadLOK screw into the wood until the head is flush with the surface.
  • Repeat this process for each screw, ensuring that each screw head is driven flush to the surface.

By following these installation steps, you can take advantage of the strength and convenience that HeadLOK screws offer for your wood construction projects.

Frequently asked questions

Headlok screws are heavy-duty wood screws with an internal drive and flat head. They are ideal for heavy-duty wood construction tasks such as deck framing, stair stringers, fences, and cabinets.

Headlok screws come in 2-7/8", 4-1/2", and 6" lengths. They are available in packs of 12, 50, 250, and 500.

Headlok screws offer higher design shear than 3/8" lag screws and no pre-drilling is required. They also have a wide head that eliminates the need for a washer, providing increased pull-through strength.

Headlok screws can be purchased from various hardware retailers, including Home Depot, Amazon, and DIYHomeCenter.

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