FastenMaster HeadLok structural wood screws are engineered to replace 3/8" lag bolts in wood-to-wood connections, eliminating the need for pre-drilling, wrenching, and washers. The wide, low-profile flat wafer head (0.625" diameter) sits flush and distributes load like a washer, while the aggressive 2-inch thread provides exceptional withdrawal and holding strength.

• Replaces 3/8" lag bolts - no pre-drilling required
• Flat wafer head installs flush, eliminates need for washers
• Carbon steel with black Ecoat corrosion-resistant coating
• ACQ approved for pressure-treated lumber
• Chisel gimlet point for fast, self-starting installation
• ICC-ES ESR-1078 code compliant
• Requires T30 TORX drive bit
• 12 screws per clamshell pack

Applications: Deck framing, stair stringers, multi-ply beams, SIP panels, fences, and general structural wood-to-wood connections.