FastenMaster ThruLOK Deck Fastners for Strong Through Bolt Connections

Whether you are a homeowner or a contractor, you demand quality products to complete a project faster, easier and stronger. FastenMaster offers quality materials for a variety of projects, including composite deck screws,  exterior wood screws, engineered wood fasteners, heavy duty wood screws, ledger board fasteners and stainless-steel trim screws.

FastenMaster Thrulok Fastener 24 Pack

FastenMaster Thrulok Fastener 24 Pack

ThruLOK is the newest addition to the FastenMaster LOK Line of structural wood-to-wood fasteners. With a three-part assembly including a ThruLOK fastener featuring the patent-pending Paddle Point™, engineered washer, and LOK-Nut, ThruLOK offers the speed of a LOK Line Product and the strength of through bolt connections.

This new fastener comes in specific lengths that allow contractors to replace their 1⁄2″ carriage and through-bolts in three primary deck applications: 6 1⁄4″ fastener – Single 2x to 4x Decking Posts, 7″ fastener – Notched 6x Carrying Beams, and 8″ fastener – Double 2x to Single 4x Decking Posts. There is no drill bits or wrenched required and installs with an 18 volt cordless drill. Moreover, their galvanized coating meets IRC ACQ corrosion requirement and there is a lifetime performance guarantee.

To install FastenMaster ThruLOK, simply put the ThruLOK-Washer on the ThruLOK screw with the teeth of the washer facing away from the head of the fastener. Using a 1⁄2″ high torque variable speed drill (18V if cordless), drive the ThruLOK until washer and hex head are just above the wood surface (approx 1⁄4″) and point of screw protrudes out other side of connection. Thread the ThruLOK-Nut onto point of fastener and tighten the nut by hand until flush with wood. Finally, tighten screw with drill and repeat to match code-compliant fastening pattern.

Build with confidence and get the job done right with new ThruLOK Fasteners from DIY Home Center.


  1. Mike Malena

    do you have longer than 7″ thru lok for decks

    • millheam

      Great Question! ThruLok is available in 6-1/4″, 7″ and 8″ lengths. You can choose from a 6 pack or a 24 pack on the FastenMaster section of our website. If you have questions, please call DIY Home Center at (888) 349-4660.

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