Technical Specifications for Tapcon® Concrete Screws
Technical Specifications
There are numerous technical specifications that must be considered when using Tapcon® screws. Determinations must be made on the diameter of the screw - standard or large diameter, length of the screw - ranging from 1-1/4" to 6", head style - hex slotted or flat Phillips, material or coating - Blue Climaseal®, Zinc Plated Large Diameter, Envirex Coated Large Diameter or Stainless Steel, embedment depth - 1” minimum to 1-3/4” maximum, and type of base material - concrete, brick or block. Once all of these factors have been determined, you can find the expected holding values in the technical information below.
Anchor Length:
To determine the minimum length required, add the thickness of the material to be fastened and the minimum embedment (1”). To determine the maximum length required, add the thickness of the material to be fastened and the maximum embedment (1-3/4”).
Anchor Spacing:
Allowable Edge and Spacing Distances - in NORMAL WEIGHT CONCRETE
| Parameter | Anchor Diameter (inches) |
Full Capacity (Critical Distance) (inches) |
Reduced Capacity (Minimal Distance) (inches) |
Load Reduction Factor |
| Edge Distance - Tension | 3/16 | 1-7/8 | 1 |
.71 |
| 1/4 | 2-1/2 | 1-1/4 |
.78 |
|
| Edge Distance - Shear | 3/16 | 2-1/4 | 1-1/8 |
.70 |
| 1/4 | 3 | 1-1/2 |
.59 |
|
| Spacing between Anchors - Tension | 3/16 | 3 | 1-1/2 |
.73 |
| 1/4 | 4 | 2 |
.66 |
|
| Spacing between Anchors - Shear | 3/16 | 3 | 1-1/2 |
.83 |
| 1/4 | 4 | 2 |
.82 |
Allowable Edge and Spacing Distances - in BLOCK
| Parameter | Anchor Diameter (inches) | Full Capacity (Critical Distance) (inches) | Reduced Capacity (Minimal Distance) (inches) | Load Reduction Factor |
| Edge Distance - Tension | 3/16 | 4 | 2 | .91 |
| 1/4 | 4 | 2 | .88 | |
| Edge Distance - Shear | 3/16 | 4 | 2 | .93 |
| 1/4 | 4 | 2 | .80 | |
| Spacing between Anchors - Tension | 3/16 | 3 | 1-1/2 | 1.00 |
| 1/4 | 4 | 2 | .84 | |
| Spacing between Anchors - Shear | 3/16 | 3 | 1-1/2 | 1.00 |
| 1/4 | 4 | 2 | .81 |
Technical Information:
Ultimate Load Values in 2000 PSI Concrete
| Size | Minimum Embedment | Drill Bit | Pull-Out (lbs.) | Shear (lbs.) |
| 3/16” | 1” | 5/32” | 600 | 720 |
| 1/4” | 1” | 3/16” | 750 | 900 |
Ultimate Load Values in Light Weight Block
| Size | Minimum Embedment | Drill Bit | Pull-Out (lbs.) | Shear (lbs.) |
| 3/16” | 1” | 5/32” | 220 | 400 |
| 1/4” | 1” | 3/16” | 250 | 620 |
Ultimate Load Values in Medium Weight Block
| Size | Minimum Embedment | Drill Bit | Pull-Out (lbs.) | Shear (lbs.) |
| 3/16” | 1” | 5/32” | 340 | 730 |
| 1/4” | 1” | 3/16” | 500 | 1000 |
Values shown are average ultimate values and are offered only as a guide and are not guaranteed. A safety factor of 4:1 or 25% is generally accepted as a safe working load. Reference should be made to applicable codes for the specific working.
Part Numbers
| Large Diameter Part Numbers | |||||||
| Blue Climaseal Part # |
Stainless Steel Part # |
Head Style |
Screw Diameter (inches) |
Screw Length (inches) |
Drill Bit Size (inches) |
Socket Size/ Bit Tip |
Fixture Hole Size (inches) |
| TCF316114 | TCFS316114 | Flat Phillips | 3/16 | 1-1/4 | 5/32 | #2 | 1/4 |
| TCF316134 | TCFS316134 | Flat Phillips | 3/16 | 1-3/4 | 5/32 | #2 | 1/4 |
| TCF316214 | TCFS316214 | Flat Phillips | 3/16 | 2-1/4 | 5/32 | #2 | 1/4 |
| TCF316234 | TCFS316234 | Flat Phillips | 3/16 | 2-3/4 | 5/32 | #2 | 1/4 |
| TCF316314 | TCFS316314 | Flat Phillips | 3/16 | 3-1/4 | 5/32 | #2 | 1/4 |
| TCF316334 | TCFS316334 | Flat Phillips | 3/16 | 3-3/4 | 5/32 | #2 | 1/4 |
| TCF3164 | — | Flat Phillips | 3/16 | 4 | 5/32 | #2 | 1/4 |
| TCF14114 | TCFS14114 | Flat Phillips | 1/4 | 1-1/4 | 3/16 | #3 | 5/16 |
| TCF14134 | TCFS14134 | Flat Phillips | 1/4 | 1-3/4 | 3/16 | #3 | 5/16 |
| TCF14214 | TCFS14214 | Flat Phillips | 1/4 | 2-1/4 | 3/16 | #3 | 5/16 |
| TCF14234 | TCFS14234 | Flat Phillips | 1/4 | 2-3/4 | 3/16 | #3 | 5/16 |
| TCF14314 | TCFS14314 | Flat Phillips | 1/4 | 3-1/4 | 3/16 | #3 | 5/16 |
| TCF14334 | TCFS14334 | Flat Phillips | 1/4 | 3-3/4 | 3/16 | #3 | 5/16 |
| TCF144 | TCFS144 | Flat Phillips | 1/4 | 4 | 3/16 | #3 | 5/16 |
| TCF145 | TCFS145 | Flat Phillips | 1/4 | 5 | 3/16 | #3 | 5/16 |
| TCF146 | TCFS146 | Flat Phillips | 1/4 | 6 | 3/16 | #3 | 5/16 |
| TCH316114 | — | Hex Washer | 3/16 | 1-1/4 | 5/32 | 1/4" | 1/4 |
| TCH316134 | — | Hex Washer | 3/16 | 1-3/4 | 5/32 | 1/4" | 1/4 |
| TCH316214 | — | Hex Washer | 3/16 | 2-1/4 | 5/32 | 1/4" | 1/4 |
| TCH316234 | — | Hex Washer | 3/16 | 2-3/4 | 5/32 | 1/4" | 1/4 |
| TCH316314 | — | Hex Washer | 3/16 | 3-1/4 | 5/32 | 1/4" | 1/4 |
| TCH316334 | — | Hex Washer | 3/16 | 3-3/4 | 5/32 | 1/4" | 1/4 |
| TCH3164 | — | Hex Washer | 3/16 | 4 | 5/32 | 1/4" | 1/4 |
| TCH14114 | TCHS14114 | Hex Washer | 1/4 | 1-1/4 | 3/16 | 5/16" | 5/16 |
| TCH14134 | TCHS14134 | Hex Washer | 1/4 | 1-3/4 | 3/16 | 5/16" | 5/16 |
| TCH14214 | TCHS14214 | Hex Washer | 1/4 | 2-1/4 | 3/16 | 5/16" | 5/16 |
| TCH14234 | TCHS14234 | Hex Washer | 1/4 | 2-3/4 | 3/16 | 5/16" | 5/16 |
| TCH14314 | TCHS14314 | Hex Washer | 1/4 | 3-1/4 | 3/16 | 5/16" | 5/16 |
| TCH14334 | TCHS14334 | Hex Washer | 1/4 | 3-3/4 | 3/16 | 5/16" | 5/16 |
| TCH144 | TCHS145 | Hex Washer | 1/4 | 4 | 3/16 | 5/16" | 5/16 |
| TCH145 | TCHS146 | Hex Washer | 1/4 | 5 | 3/16 | 5/16" | 5/16 |
| TCH146 | TCHS146 | Hex Washer | 1/4 | 6 | 3/16 | 5/16" | 5/16 |
| LDT38134 | LDTS38134 | Hex Washer | 3/8 | 1-3/4 | 5/16 | 9/16" | 1/2 |
| LDT38212 | LDTS38212 | Hex Washer | 3/8 | 2-1/2 | 5/16 | 9/16" | 1/2 |
| LDT383 | LDTS383 | Hex Washer | 3/8 | 3 | 5/16 | 9/16" | 1/2 |
| LDT384 | LDTS384 | Hex Washer | 3/8 | 4 | 5/16 | 9/16" | 1/2 |
| LDT385 | LDTS385 | Hex Washer | 3/8 | 5 | 5/16 | 9/16" | 1/2 |
| LDT12212 | LDST12212 | Hex Washer | 1/2 | 2-1/2 | 7/16 | 3/4" | 5/8 |
| LDT123 | LDTS123 | Hex Washer | 1/2 | 3 | 7/16 | 3/4" | 5/8 |
| LDT124 | LDTS124 | Hex Washer | 1/2 | 4 | 7/16 | 3/4" | 5/8 |
| LDT125 | LDTS125 | Hex Washer | 1/2 | 5 | 7/16 | 3/4" | 5/8 |
| LDT126 | — | Hex Washer | 1/2 | 6 | 7/16 | 3/4" | 5/8 |
| LDT583 | — | Hex Washer | 5/8 | 3 | 1/2 | 15/16" | 3/4 |
| LDT584 | — | Hex Washer | 5/8 | 4 | 1/2 | 15/16" | 3/4 |
| LDT585 | — | Hex Washer | 5/8 | 5 | 1/2 | 15/16" | 3/4 |
| LDT586 | — | Hex Washer | 5/8 | 6 | 1/2 | 15/16" | 3/4 |
| LDT34412 | — | Hex Washer | 3/4 | 4-1/2 | 5/8 | 15/16" | 7/8 |
| LDT34512 | — | Hex Washer | 3/4 | 5-1/2 | 5/8 | 15/16" | 7/8 |
| LDT34614 | — | Hex Washer | 3/4 | 6-1/4 | 5/8 | 15/16" | 7/8 |