Home
Our Products
Caliburn™ XL Concrete Screw
Caliburn™ XL Concrete Screw
-- patented --
Concrete Flat Washer Head Screw
Caliburn™ screws are professionally engineered fasteners for concrete and similar applications. They feature a patented thread design for ease of driving the screw. They are available in different head designs for multiple applications with the recommended GRK™ Drill Bits. Caliburn™, Caliburn™ PH and Caliburn™ XL are Climatek™ coated for high corrosion resistance.
Features:
Star Drive Recess
Complete and Effective Installation
Case Hardened Steel
To Use:
Pre-drill pilot hole with 3/16 Concrete Drill Bit for Caliburn™ and Caliburn™ PH screws,
or 1/4 GRK Concrete Drill Bit
for Caliburn™ XL screws.
Clear concrete dust from hole.
Drive the screw with GRK #25 or #30 bit for Caliburn™ and Caliburn™ PH screws,
or #40 bit for Caliburn™ XL screws.
Caliburn™ Concrete Screw Test Data
| TECHNICAL DATA - Caliburn™ | ||||||
| Screw Size | Embed. Depth | 2000 psi Concrete | Bit Size | Drill Size | ||
| Tension Pullout lbs/in |
Shear lbs/in |
|||||
| 1/4 x 1"3/4 | 1"1/2 | 1655 | 1505 | T25 | 3/16" | |
| 1/4 x 2"1/4 | 2" | 2120 | 2055 | T25 | 3/16" | |
| 19/64 x 2"3/4 | 2"1/2 | 2209 | 3135 | T40 | 1/4" | |
| 19/64 x 3"1/2 | 3"1/4 | 2523 | 3200 | T40 | 1/4" | |
| 19/64 x 5" | 4"3/4 | 5724 | 3300 | T40 | 1/4" | |
NOTE:
- All values are based on close tolerance holes drilled a minimum of 1/4" deeper than embedment depth, using GRK drill bits.
- All listed values shown at left are average pullout and shear values for GRK's Caliburn™, Caliburn™ PH and Caliburn™ XL screws. Values will vary depending on a number of factors, including the quality of the concrete and size of the drill hole.
- These figures are only offered as a guide, are not guaranteed by GRK and not reduced by any safety factor.
- For safety factor requirements in your area, contact your local building official architect or engineer. Testing was performed according to ASTM standard E-488-96. For specific calculations refer to ACI #318 Appendix D
View Price List
View Selection Guide
Download This Catalog Page
