Concrete Screws ~ Tapcon®

Purchase Tapcon® Concrete Screws

Tapcon® Concrete Screw Installation Video

Technical Information:

The Tapcon® brand concrete screw cuts threads in a predrilled hole in concrete, brick or block. The screw has alternating raised and lowered threads with diamond cut notches which provide exceptional holding power and stability. The Tapcon® brand concrete screw is available in both 3/16" or 1/4" diameters with either a flat phillips #3 countersunk or a 5/16" hex washer head. All screws are plated using the Climaseal® coating which provides extended life and additional lubricity for ease of installation. Tapcon® screws are also available in 410 stainless steel finished with Climashield. The stainless steel screws have shown no red rust in salt spray test performed at a certified A2LA laboratory per ASTM B117 specifications. The Large Diameter Tapcons are available in 3/8”, 1/2”, 5/8” and 3/4", and come in standard, Envirex Coated and Stainless Steel.

Approvals:

Standard (3/16” and 1/4") Blue Screws meet the following:

  • Miami Dade #07-0315.03
  • ICC-ES Evaluation Report ESR-1671
  • Florida Building Code FL7556

Large Diameter Tapcons meet the following:

  • Metro-Dade County #04-1025.08
  • Florida Building Code

Tapcon® Concrete Screw - Applications:

Light to medium-duty in concrete, brick and block.

Tapcon® Concrete Screw - Installation:

  1. Drill a pilot hole in the base material using a hammer drill and properly sized carbide tipped masonry drill bit. The depth of the hole should be at least 1/2" deeper than the recommended anchor embedment.
  2. Clear the hole of all debris.
  3. Place the object to be fastened over the hole and insert the point of the Tapcon® concrete screw into the hole. Drive the screw in using a nut driver or #3 bit tip. Be careful not to over-torque the screw – this will cause the screw to spin in the hole, stripping the threads.

Tapcon® Concrete Screw - Screw Length:

The length of the Tapcon® fastener to be used is determined by combining the thickness of the material to be attached with the desired depth of embedment in the base material. It is recommended that a minimum of 1" and a maximum of 1-3/4" embedment be used in determining fastener length. The diameter of the fastener and the depth of embedment affect pullout strengths. A carbide-tipped drill bit is supplied with each box of Tapcon® fasteners. The correct hole must be drilled for the screw to obtain holding values. In all cases the hole must be at least 1/4" deeper than the depth of the fastener embedment.

Tapcon® Concrete Screw – Screw Spacing:

The manufacturer's recommended edge distance and anchor spacing for Tapcon® Concrete Screws is determined from the ICC Evaluation Report ESR-1671.

Technical Data:

Standard Blue Tapcon® Screws

Pull Out Values (lbs.) - Concrete
Anchor Diameter Embedment Depth Concrete Strength
2000 psi 4000 psi 5000 psi
  1" 600 650 800
3/16" 1-1/2" 1090 1090 1220
  1-3/4" 1450 1460 1730
  1" 750 800 950
1/4" 1-1/2" 1380 1820 2170
  1-3/4" 2020 2380 2770
Shear Values (lbs.) - Concrete
Anchor Diameter Embedment Depth Concrete Strength
2000 psi 4000 psi 5000 psi
  1" 720 720 860
3/16" 1-1/2" 860 860 860
  1-3/4" 870 990 990
  1" 900 1360 1440
1/4" 1-1/2" 1200 1380 1670
  1-3/4" 1670 1670 1670

 

Tension and Shear (lbs.) in CMU (1" embedment)
  Tension (lbs) Shear (lbs)
Anchor Diameter Light Weight Medium Weight Light Weight Medium Weight
3/16" 220 340 400 730
1/4" 250 500 620 1000

Stainless Steel Tapcon® Screws

Pull Out Values (lbs.) - Concrete (3000 psi, cured 40 days)
Anchor Diameter Depth of Embedment in Solid Material (inches)
1" 1-1/4" 1-1/2" 1-3/4"
3/16" 964 1080 1360 1595
1/4" 1381 1616 2041 2332
Pull Out Values (lbs.) - Hollow Block
Anchor Diameter Depth of Embedment in Solid Materials (1-1/4")
3/16" 540
1/4" 754
Shear Values (lbs.)
Anchor Diameter Anchor Embedment Shear Strength Shear Strength
3145 PSI Hard Lightweight
Rock Concrete Hollow Block
3/16" 1-1/4" 1460 1096
1/4" 1-1/4" 1622 1218

Large Diameter Tapcons

Carbon & Stainless Steel

    2000 PSI 3000 PSI 4000 PSI
Diameter Embedment Depth Tension (lbs.) Shear (lbs.) Tension (lbs.) Shear (lbs.) Tension (lbs.) Shear (lbs.)
3/8" 1-1/2" 1336 2108 1652 2764 1968 3416
  2" 1492 3036 2024 3228 2552 3420
  2-1/2" 3732 3312 3748 3364 3760 3424
  3-1/2" 5396 3312 6624 3368 7852 3428
1/2" 2" 3580 5644 3908 6512 4236 7380
  3-1/2" 7252 6436 8044 7288 8836 8140
  4-1/2" 10176 7384 10332 7968 10488 8552
5/8" 2-3/4" 5276 8656 6560 11064 7844 13476
  3-1/2" 7972 10224 9848 12144 11724 14060
  4-1/2" 11568 12316 13432 13580 16892 14840
3/4" 3-1/4" 6876 7140 9756 10728 12636 14316
  4-1/2" 10304 13120 14424 16868 18540 20612
  5-1/2" 13048 17908 18156 21718 23268 25652

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 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.