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FastenMaster Screws and Fastening Systems

The FastenMaster Cortex Concealed Fastening System is the fastest, easiest way to hide fastener heads on many market-leading composite decking and PVC trim boards. The finished look of the Cortex System is virtually invisible, so you can enjoy the attractive deck surface without seeing any screw heads.

FastenMaster's LOK Line™ is a collection of structural wood-to-wood fasteners used by contractors nationwide to meet code and lower cost.

FastenMaster also offers quality screws for a variety of projects including composite deck screws, gutter screws, log home fasteners and stainless steel trim screws.

Contact us or come in to any National Lumber location to ask about FastenMaster screws and fasteners or any other details of your project.

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