Omg Inc FMHLGM412-12 Headlok Screw 4.5 in 12 Pack

Product Description

The OMG INC FMHLGM412-12 is a 4.5-inch Headlok structural screw sold in a 12-pack, designed for heavy-duty wood-to-wood fastening applications. The non-countersinking head sits flush without requiring countersinking or pre-drilling, which reduces installation time and eliminates an additional prep step on the jobsite. The patented Spider Drive system provides positive bit engagement and reduced cam-out, delivering consistent torque transfer during installation. These screws are rated for use with ACQ-treated lumber, making them suitable for exterior structural connections. Contractors, framers, and finish carpenters install this fastener in a wide range of structural and finish applications.

This screw is intended for wood-to-wood connections in both residential and light commercial construction. Typical applications include deck framing, fence assembly, header installation, and kitchen cabinet mounting. The removable design allows for disassembly and adjustment after installation, which is useful in applications where fasteners may need to be backed out during phased construction or renovation work. The ACQ approval makes it appropriate for pressure-treated lumber commonly used in outdoor and ground-contact assemblies.

Key Features

• No pre-drilling required, reducing prep time on wood-to-wood connections
• Non-countersinking head eliminates the need for a countersink bit
• Patented Spider Drive system reduces cam-out and improves bit engagement
• Removable fastener allows disassembly and realignment after installation
• ACQ approved for use with pressure-treated lumber in exterior applications
• Sold in a 12-pack for small-batch or repair work

Compatibility

Designed for wood-to-wood structural fastening applications including decks, fences, headers, kitchen cabinets, and similar connections using ACQ-treated or untreated dimensional lumber.

Installation Notes

Installation does not require pre-drilling, but a compatible Spider Drive bit is required for proper engagement with the drive system. Power down all adjacent electrical circuits before working in areas where fasteners may be driven near wiring. Follow applicable building codes, including IRC framing requirements, when using structural screws in load-bearing assemblies. Always verify fastener spacing and embedment depth against project specifications or engineered drawings.