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Caliburn™ PH Screw

Concrete Pan Head Screw

For Concrete & Masonry Applications
Available in Bugle, Pan & Washer Head
An Anchoring System In Itself
Professionally Engineered
Can Be Removed & Reinserted Into Same Pilot Hole Numerous Times

Caliburn™ PH* concrete screws are professionally engineered fasteners for concrete and similar applications to resist static, wind and seismic, tension and shear loads in cracked and uncracked normal-weight concrete and sand-lightweight concrete. Anchors may only be used for redundant applications, where multiple anchors support linear elements (e.g. ductwork) when designed. The aggressive thread pattern creates a track that burrows into concrete and is designed for trapping excessive concrete dust thus keeping the threads sharp. They feature a patented thread design for ease of driving the screw. The Caliburn™ PH concrete is Climatek™ coated for high corrosion resistance.The Caliburn™ PH concrete Pan Head screw is ideal for electrical and plumbing applications.


  • Star Drive Recess
  • Complete and Effective Installation
  • Case Hardened Steel

To Use:

  • Pre-drill pilot hole with 3/16" Concrete Drill Bit.
  • Clear concrete dust from hole.
  • Drive the screw with GRK #30 bit.

*Product not available in Canada

Product Sheet
GRK Headquarters

GRK Fasteners USA
ITW Renovations / Remodeling
155 Harlem Avenue, Building N3E
Glenview, IL 60025
Tel: 877-489-2726
Fax: 847-619-8403

GRK Fasteners Canada
ITW Construction Products
120 Travail Road
Markham, ON L3S 3J1
Tel: 800-263-0463
Fax: 800-895-5160