1/4 x 8-1/2 in. Fastenmaster Wafer Head Headlok, Spider - Qty:25

1/4 x 8-1/2-in. FastenMaster® HeadLOK™ Heavy-Duty Structural Wood Screws

FastenMaster® HeadLOK™ Screws are heavy-duty structural wood fasteners designed for demanding wood-to-wood and wood-to-OSB applications. They are an excellent alternative to traditional 3/8-inch lag screws and are ideal for deck framing, stair stringers, landscape timbers, fences, log-home insulated panels, structural insulated panels (SIPs), kitchen cabinets, and other heavy-duty woodworking and construction projects.

The HeadLOK flat-head design provides a clean, finished appearance while delivering strong holding power. A sharp gimlet point allows the screw to install quickly into wood and OSB without predrilling, helping save time on demanding installation projects. The aggressive thread design provides excellent holding and withdrawal strength for dependable structural connections.

SpiderDrive™ System for Secure Installation

HeadLOK Screws feature the FastenMaster® SpiderDrive™ System with eight points of contact between the drive bit and screw head. This multi-point design helps maximize bit engagement, reduce stripping, and provide reliable torque transfer during installation. A free SpiderDrive™ bit is included with every package for convenient installation right out of the box.

Benefits & Features

• Heavy-duty structural fastener: Designed for demanding wood construction and structural fastening applications.
• 3/8-inch lag screw replacement: Provides a convenient alternative to traditional 3/8-inch lag screws.
• No predrilling required: Sharp gimlet point helps the screw penetrate wood and OSB quickly.
• Flat-head design: Creates a clean, finished appearance when properly installed.
• Aggressive thread: Delivers strong holding and withdrawal strength in wood applications.
• SpiderDrive™ system: Eight points of contact maximize bit fit and help reduce stripping.
• Free installation bit: Every package includes a SpiderDrive™ bit.

Versatile Wood Construction Applications

FastenMaster HeadLOK Screws are well suited for a wide range of heavy-duty projects where strong, reliable wood connections are needed. Use them for deck framing, stair stringers, landscape timbers, fences, structural insulated panels, log-home insulated panels, kitchen cabinets, and other wood construction applications.

With fast installation, strong thread engagement, a clean flat-head profile, and the secure SpiderDrive™ system, HeadLOK Screws are a practical choice for contractors, builders, woodworkers, and serious DIYers looking for dependable structural wood fastening.