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At GRK Fasteners we are committed to manufacturing and supplying high quality multi-purpose screws and fasteners. Many of our screws and fasteners are patented NOT patent pending, making them one of a kind.

In the design, development and manufacturing of all of our products we adhere to the following principles to ensure that our customers are getting the Industry’s Toughest Screws:

quality design
no hassles and labor reducing
multi-purpose
extended life
strong heads
built to last

Patented W-Cut™ Thread Design and ZipTip™

NO pre-drilling
NO hassles
NO strip drive
Reduced splitting
Easy start

The W-Cut™ is a patented thread design which acts like a saw blade cutting through any fibrous materials with ease. This unique design reduces the amount of torque required to install the screw, and maintains a high pull out strength. By cutting through, rather than pressing fibers aside, the W-Cut™ also reduces material splitting.

The W-Cut™ design is available on all GRK screws and fasteners, 1 1/4" and longer, with the exception of the Top Star™. GRK's ZipTip™ is designed for fast starts in any fibrous materials.
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Climatek™ – GRK Fasteners All Weather Coating

GRK Fasteners revolutionary Climatek™ coating is available only on GRK products.

GRK’s Climatek™ coating consists of a total of six layers of various materials, including three layers of zinc-polymer.

Climatek™ has been tested for salt spray resistance, and more importantly, for Kesternich durability. Kesternich cycles are a more advanced way of testing a coated material. Each Kesternich cycle simulates heat, cold, wind, water, salt as well as a variety of other elements, whereas salt spray merely uses salt water for its tests.

Climatek™ passed 29 Kesternich cycles, making it the most advanced coating of its kind.

GRK’s Climatek™ conforms with ICC-NES Report #NER-643, #NER-628  and #NER-669 which allow for use of triple zinc polymer coated fasteners in contact with ACQ treated woods.
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For more information about our products, please use the menu on the left to browse our product lines.