Tapcon® Concrete Screws

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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

Tapcon® Ultimate Holding Values** - in NORMAL WEIGHT CONCRETE

Blue Climaseal Tapcon®

    2000 PSI Concrete 4000 PSI Concrete
Anchor Diameter (inches) Embedment Depth (inches) Tension (lbs.) Shear (lbs.) Tension (lbs.) Shear (lbs.)
3/16 1 600 720 650 720
1-1/2 1090 860 1090 860
1-3/4 1450 870 1460 990
1/4 1 750 900 800 1360
1-1/2 1380 1200 1820 1380
1-3/4 2020 1670 2380 1670

Stainless Steel Tapcon®

    3000 PSI Concrete
Anchor Diameter (inches) Embedment Depth (inches) Tension (lbs.) Shear (lbs.)
3/16 1 964  
1-1/4 1080 1460
1-3/4 1595  
1/4 1 1381  
1-1/4 1616 1622
1-3/4 2332  

Large Diameter Tapcon® - Zinc & Stainless Steel

    2000 PSI Concrete 4000 PSI Concrete
Anchor Diameter (inches) Embedment Depth (inches)   Tension (lbs.)   Shear (lbs.)   Tension (lbs.)   Shear (lbs.)
3/8 1-1/2 1336 2108 1968 3416
2 1492 3036 2552 3420
3 5396 3312 7852 3428
1/2 2 3580 5644 4236 7380
3-1/2 7252 6436 8836 8140
4-1/2 10176 7384 10488 8552
5/8 2-3/4 5276 8656 7844 13476
3-1/2 7972 10224 11724 14060
4-1/2 11568 12316 16892 14840
3/4 3-1/4 6876 7140 12636 14316
4-1/2 10304 13120 18540 20612
5-1/2 13048 17908 23268 25652

Tapcon® Ultimate Holding Values** - in BLOCK

Blue Climaseal Tapcon®

    Light Weight Block Medium Weight Block
Anchor Diameter (inches) Embedment Depth (inches) Tension (lbs.)   Shear (lbs.) Tension (lbs.)   Shear (lbs.)
3/16 1 220 400 340 730
1/4 1 250 620 500 1000

Stainless Steel Tapcon®

    Hollow Block
Anchor Diameter (inches) Embedment Depth (inches)   Tension (lbs.)   Shear (lbs.)
3/16 1-1/4 540 1096
1/4 1-1/4 754 1218

Large Diameter Tapcon® - Zinc & Stainless Steel

    Hollow Block Grout Filled Block
Anchor Diameter (inches) Embedment Depth (inches)   Tension (lbs.)   Shear (lbs.)   Tension (lbs.)   Shear (lbs.)
3/8 1-1/2 916 3176 1592 3900
1/2 2-1/2     5924 6680

** 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 ratio. All values are based on close-tolerance holes drilled with carbide tipped drill bits. Designated holding power depends on the quality of the masonry material, depth of embedment, and proper hole size.

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