1/4" x 2-1/4" GRK Caliburn Screws - Box of 50
- Peoples Building Supply SKU : 57156
- Manufacturer Part Number : GRK 57156
- Manufacturer : GRK
- Shipping Weight : 1.00lbs.
Concrete Flat 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. Both Caliburn™ 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™ screws or 1/4 GRK Concrete Drill Bit for Caliburn™ XL screws. Clear concrete dust from hole. Drive the screw with GRK #25 bit for Caliburn™ screws or #40 bit for Caliburn™ XL screws.
DRILL BIT INCLUDED IN BOX
|
TECHNICAL DATA | |||||
|
Screw Size |
Embed. Depth (in) |
2000 psi Concrete |
Bit Size |
Drill Size | |
|
Tension Pullout (lbs) |
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™ 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
