Where to buy
  • Product Information
  • Related Products
  • FAQ'S

Product Information

Caliburn Concrete Screw Applications

Caliburn Concrete Screw Varieties

Caliburn™ Concrete Screw

Countersinking bugle head locks wood to conrete for complete installation and effective anchoring

Caliburn™ PH Screw

Concrete pan head screw is ideal for an exposed finished look including installation of electrical boxes

Caliburn™ XL Screw

Washer head design for superior holding power

Product Documentation

Caliburn™ Concrete Screw - Product Video

Related Products


Does your Climatek coating contain any heavy metals such as Cadmium?

No, GRK's coating does not contain any heavy metals.

What does GRK mean when they state wood was tested at a specific gravity?

There is a number assigned to specific wood types. This number helps to determine the Tensile and Shear of fasteners used in these gravities.

What are Tensile and Shear values for GRK screws in OSB Plywood?

The manufacturer of the OSB would have to be contacted for the gravity/contents of the plywood in order to determine the pull out and shear.

Can MCQ be used with any GRK screws?

Yes, GRK screws can be used in MCQ treated lumber.

Can Caliburn™ be used in Brick?

Yes, Caliburn and Caliburn XL screws can be used in brick.

Do all GRK Screws have the Zip Tip™ feature

All GRK R4, RSS, Cabinet, Trim, and MSS screws 1" in length and longer contain the Zip TipTM feature.

When should I use stainless steel screws?

Use of 305 stainless steel screws are recommended for use in Ipe, Wolmanized Treated Lumber, Cedar, White Oak, and any hardwood.

Anything within 1 mile of the coast should use 316 Stainless Steel fasteners and anything within 15 miles of the coast should use 305 Stainless Steel fasteners.

Do you need to pre-drill for Caliburn™ screws?

Yes, Pre-drilling is required for installation of Caliburn in concrete and masonry applications.

What is Climatek™ Coating?

The GRK Climatek coating provides superior corrosion resistance, allowing the screw to be used in both interior and exterior applications as well as pressure treated lumber.