5/8" x 8-1/2" Power-Stud+® SD4 Expansion Anchor, 25/Box

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  • Consistent performance in high and low strength concrete
  • Nominal drill bit size is the same as the anchor diameter
  • Anchor can be installed through standard fixture holes
  • Length ID code and identifying marking stamped on head of each anchor
  • Anchor design allows for follow-up expansion after setting under tensile load
  • International Code Council, Evaluation Service (ICC-ES), ESR-2818 for cracked and uncracked concrete
  • International Code Council, Evaluation Service (ICC-ES), ESR-2966 for masonry
  • Code compliant with the 2015 IBC, 2015 IRC, 2012 IBC, 2012 IRC, 2009 IBC, and 2009 IRC
  • Tested in accordance with ACI 355.2/ASTM E 488 and ICC-ES AC193 for use in structural concrete under the design provisions of ACI 318-14 Chapter 17 or ACI 318-11/08 Appendix D
  • Evaluated and qualified by an accredited independent testing laboratory for recognition in cracked and uncracked concrete including seismic and wind loading (Category 1 anchors)
  • Tested in accordance with ICC-ES AC01 for use in Masonry
  • Underwriters Laboratories (UL Listed) - File No. EX1289, see listing for sizes

The anchor is made from 304 Stainless Steel. 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 wet environment.

Hole Diameter/Bit Diameter
The anchor requires a 5/8" 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 anchor is 5/8".

Length Anchor
The length of the anchor is 8-1/2"

Thread Type
The threads on the anchor are national coarse threads that measures 5/8" with 11 threads per inch, commonly referred to as 5/8"-11.

Thread Length
The length of the threads on the anchor is 6-1/2" 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 minimum anchor embedment into the concrete is 2-3/4". Therefore, the anchor must be installed so that a minimum of 2-3/4" of the anchor is embedded into the concrete.

Depth of Hole
The depth of the hole that is required for the anchor should be a minimum of 1/2" deeper than the anchor will penetrate the concrete. This will allow space for dust created during the installation process to fall, which will prevent the anchor from bottoming out in the hole before full penetration into the concrete.

Maximum Fixture Thickness
The maximum fixture thickness or the maximum thickness of the material being fastened for a anchor is 5-1/8". This will ensure that the minimum embedment of 2-3/4" 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 5/8" diameter anchor requires the hole in the fixture to be {MinimumFixtureHoleDiameter(InPlace)}.

Wrench Size
The size of the wrench required to turn the nut to set the anchor is 15/16".

Torque Value
To be set properly in the concrete, the anchor must be torqued to between 80 ft./lbs.

Bolt Length
When a bolt is used in conjunction with the anchor, the length of the bolt needed is determined by considering these factors:

  • Flush With Concrete - when the anchor is set flush with the surface of the concrete, add the thickness of the material being fastened to the thread length of 6-1/2", and then add the space for any washers used.
  • Below Surface of Concrete - add the depth below the surface of the concrete to the thickness of the material being fastened, then add the space for the washer, and, finally, add 6-1/2" for the thread engagement.

The anchor is stamped with the letter O on the threaded end to allow inspection of the anchor after installation. The letter "O" designates an overall length of the anchor as between 8-1/2" up to, but not including 9" in length.

Products Specifications
Bit Size5/8"
Minimum Embedment2-3/4"
Thread Length6-1/2"
PrimaryConcrete only
Thread Type5/8" - 11
Material304 Stainless Steel
Box Qty25
Minimum SpacingSee PDF
Minimum Edge DistanceSee PDF
Maximum Fixture Thickness5-1/8"
Minimum Fixture Hole Diameter (In Place)11/16"
Minimum Fixture Hole Diameter (Hole Spotted)5/8"
Length ID CodeO
Maximum Torque80 ft./lbs.
Wrench Size For Nut15/16"
Length MeasurementEnd to End
Brand NamePowers
Concrete ApplicationCracked & Uncracked Approved
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Additional Information

Bit Size:
Minimum Embedment:
Thread Length:
Concrete only
2000 PSI Concrete - Pull-Out (lbs.) *:
2000 PSI Concrete - Shear (lbs.) *:
304 Stainless Steel
Box Qty:
Minimum Edge Distance:
Maximum Fixture Thickness:
Minimum Fixture Hole Diameter (In Place):
Minimum Fixture Hole Diameter (Hole Spotted):
Length ID Code:
Maximum Torque:
75 - 90 ft./lbs.
Wrench Size For Nut:
Length Measurement:
End to End
Brand Name:
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