ThruLOK® Structural deck screws connecting multiple wood supports
Rafter installation e1ef1a5c
Thru Lok components 614in components
Thru Lok 7in assembled
NEW Thru LOK Family 2022 sm

The ThruLOK System combines the strength of a through-bolted connection with the speed of a FastenMaster LOK fastener.


Through-Bolt Replacement
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No Pre-Drilling Required

Installs quickly with an 18 volt cordless drill without special drill bits or wrenches required.

Carriage & Through-Bolt Replacement

The 6 1/4" is engineered to connect 4x4 posts to 2x joists. The 7" is engineered to connect two 2x beams to a notched 6x6 post. The 8" is engineered to connect 4x4 posts to a double rim joist or single rim joist and 2x blocking. The 9 1/2" is engineered to attach a 6x6 post to two 2x beams.

Meets Code Requirements

ThruLOK's galvanized coating meets code requirements for treated wood. It's both ACQ Approved and IBC/IRC code compliant.

Thru Lok angled head

Part Numbers

6 1/4"  4 1/2" to 5 1/4"  4x4 deck posts to 2x rim joists connectionsSingle FastenerFMTHR614-INDY
24 pc boxFMTHR614-24
7"  5 1/4" to 6"  2x beams to a notched 6x6 post connectionsSingle FastenerFMTHR007-INDY
24 pc boxFMTHR007-24
8"  6 1/4" to 7"  4x4 posts to double rim joist or single rim joist and 2x blockingSingle FastenerFMTHR008-INDY
24 pc boxFMTHR008-24
9 1/2"  7 3/4" to 8 1/2"  2x beams to 6x6 post connectionsSingle FastenerFMTHR912-INDY