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Concrete Anchors & Fasteners is Our Specialty   Questions? Contact Mike   

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For orders $25
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1/2" x 5-1/2" Red Head Trubolt Wedge Anchor Zinc Plated, 25/Box

   Availability: In Stock
  Questions? Email Mike

$28.75 per Box of 25
    Payment types
Purchase the 1/2" x 5-1/2" Trubolt carbon steel with zinc plating direct: receive huge savings and free freight. All orders ship the same day they are received.
SKU: WS1254
  MFG: ITW/RedHead®


Customer Reviews

ITW/RedHead® - 1/2" x 5-1/2" Trubolt® Wedge Anchor

The 1/2" x 5-1/2" Trubolt® Wedge Anchor (25 pcs per box) are designed for fastening items to concrete. All orders will be received in 1 to 3 days when shipped in the Continental United States.

  • Bit size 1/2"
  • Minimum embedment 2-1/4"
  • Thread Length 3"
  • Zinc plated for indoor use
  • Do not use in vibratory loads
  • Packaged with zinc plated nuts and washers
  • 1/2" inch diameter x 5-1/2" inch long
  • Spacing must be a minimum of 10 anchor diameters
  • Free freight on all orders over $25.00
Products specifications
Bit Size 1/2"
Minimum Embedment 2-1/4"
Thread Length 3"
Thread Type 1/2" - 13
3000 PSI Concrete - Pull-Out (lbs.) * 2925
3000 PSI Concrete - Shear (lbs.) * 2855
Type Male
Primary Concrete only
Diameter 1/2"
Length 5-1/2"
Material Carbon Steel Zinc Plated
Environment Dry
Box Qty 25
Maximum Fixture Thickness 2-3/4"
Minimum Fixture Hole Diameter (In Place) 9/16"
Minimum Fixture Hole Diameter (Hole Spotted) 1/2"
Length ID Code I
Wrench Size For Nut 3/4"
Length Measurement End to End

The 1/2" x 5-1/2" Trubolt® Wedge Anchor is made from Carbon Steel, and is Zinc Plated. This anchor is designed for use in concrete only, and should never be used in block or brick base material.

The anchor is designed for use in a dry environment.

Hole Diameter/Bit Diameter
The anchor requires a 1/2" hole to be drilled in the base material (concrete only). The hole should be drilled with carbide tipped bit that meets ANSI standards and used in a hammer drill.

Diameter of Anchor
The diameter of the 1/2" x 5-1/2" Trubolt® Wedge Anchor is 1/2".

Length Anchor
The length of the anchor is 5-1/2", and is measured as an overall length of the anchor from end to end.

Thread Type
The threads on the anchor are national coarse threads that measures 1/2" with 13 threads per inch, commonly referred to as 1/2"-13.

Thread Length
The length of the threads on the anchor is 4" in length.

The anchor is packaged with 25 pieces per box and is packaged with the correct number and diameter of nuts and washers.

Minimum Embedment
The anchor minimum embedment into the concrete is 2-1/4". Therefore, the anchor must be installed so that a minimum of 2-1/4" of the anchor is embedded into the concrete.

Maximum Fixture Thickness
The maximum fixture thickness or the maximum thickness of the material being fastened for a anchor is 2-3/4". This will ensure that the minimum embedment of 2-1/4" will be met.

Fixture Hole Diameter
The hole in the fixture or material being fastened must be larger than the designated diameter of the anchor. The 1/2" diameter anchor requires the hole in the fixture to be 9/16".

Wrench Size
The size of the wrench required to turn the nut to set the anchor is 3/4".

Torque Value
The maximum torque that can be applied to the anchor once installed is 55 ft./lbs.

Spacing between Anchors
Each anchor must be spaced a minimum distance of 7-7/8" from each other when measured center to center.

Edge Distance
It is very important not to install the anchor any closer than 3-15/16" from an unsupported edge of the concrete.

The anchor is stamped with the letter I on the threaded end to allow inspection of the anchor after installation. The letter "I" designates an overall length of the anchor as between 5-1/2" up to, but not including 6" in length.

Holding Values - Ultimate Load Values in 2000 PSI Concrete

anchor Size

Minimum Embedment

Pull-Out (lbs.)

Shear (lbs.)

1/2" x 5-1/2"




Product Information


Part number

Quantity per Box

1/2" x 5-1/2" Trubolt® Wedge Anchor



Installing a 1/2" x 5-1/2" Trubolt® Wedge Anchor
  1. Drill a 1/2" hole into the concrete using a carbide tipped bit that meets ANSI Standards B212.15.
  2. Drill the hole a 1/2" deeper than the anchor will penetrate the concrete, making sure the minimum embedment requirements of 2-1/4" is met.
  3. The hole can be drilled while the fixture is in place. The minimum hole in the fixture for the 1/2" x 5-1/2" Trubolt® Wedge Anchor is 9/16".
  4. Clean the hole with a wire brush, vacuum, compressed air, or a blow-out bulb.
  5. Put the nut and washer on the 1/2" x 5-1/2" Trubolt® Wedge Anchor, making sure the nut is on the last threads; this will protect the threads from damage when the wedge anchor is hammered into the hole and into the concrete.
  6. Insert the anchor through the hole in the fixture and into the hole in the base material.
  7. This should be a very tight fit. Then use a hammer to complete the installation until the nut and washer are tight against the fixture. It is important that the threads go below the surface of either the base material or the fixture.
  8. Turn the nut clockwise on the anchor until finger tight.
  9. Using a 3/4" wrench, turn the nut 3 to 4 times until snug or until the proper torque value of 55 ft./lbs. is reached.
  10. Always use proper personal protective equipment per manufacturers and OSHA instructions.

1/2" x 5-1/2" zinc plated wedge anchors - concrete -painted fence post


* The figures above indicate average ultimate tension and shear failure values. A safety factor of 4:1 or 25% of ultimate value is generally accepted as a safe working load. Reference should always be made to applicable codes.

These bits work with the selected anchor
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