Omg Inc FMHLGM412-50 Headlok Screw 4.5 in 50 Pack

Product Description

The OMG INC FMHLGM412-50 is a 4.5-inch Headlok structural screw sold in a 50-pack, designed for heavy-duty wood-to-wood connections without pre-drilling. The patented Spider Drive system provides positive bit engagement and reduces cam-out during installation. The non-countersinking head sits flush against the surface and remains removable, making it a practical choice for structural assemblies that may require future disassembly. At 14.4 pounds per pack, this is a jobsite-ready quantity for framing and finish carpentry crews. The fastener is ACQ-approved, making it suitable for use with pressure-treated lumber in outdoor applications.

This screw is used across residential and light commercial construction applications including deck framing, fence installation, header connections, and kitchen cabinet mounting. Any wood-to-wood structural connection is a candidate for this fastener. The combination of no pre-drilling requirement and a removable design makes it efficient on production installs where speed and serviceability both matter. Carpenters, framers, and deck contractors are the primary installers.

Key Features

• No pre-drilling required — drives directly into lumber without pilot holes
• Patented Spider Drive system for positive torque transfer and reduced cam-out
• Non-countersinking head sits flush without recessing into the wood face
• Removable fastener design supports disassembly and rework
• ACQ-approved for use with pressure-treated lumber in outdoor and ground-contact applications
• 50-pack quantity suited for production framing and deck builds

Compatibility

Designed for wood-to-wood structural connections including decks, fences, headers, and cabinet installations. ACQ approval confirms compatibility with pressure-treated lumber commonly used in exterior construction.

Installation Notes

Installation is performed by carpenters, framers, and deck contractors using a compatible Spider Drive bit. No pilot hole is required, but ensure the drive bit is fully seated before applying torque to avoid stripping the drive recess. Follow applicable building codes for structural fastener spacing and shear load requirements when used in deck framing or header connections. Confirm ACQ-rated hardware is used throughout when fastening pressure-treated lumber in exterior or ground-contact assemblies.