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7/8" x 8" Zinc Plated U.S. Made Thunderstud Wedge Anchor, 5/Box

$31.55 per Box of 5
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SKU: TS788
  MFG: American Made ThunderStud®
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Products Features
  • MADE IN AMERICA: Assures top quality and meets most Made in America requirements
  • PATENTED UNIVERSAL CLIP: Anchor does not spin in the hole which makes each fastening faster and more secure
  • PARTIAL THREADS: Assures proper anchor length is used to meet minimum embedment depths
  • LENGTH I. D. STAMPED ON EACH ANCHOR: Provides for a fast easy inspection of embedment depth
Products specifications
Bit Size 7/8"
Minimum Embedment 3-7/8"
Thread Length 2-1/4"
Thread Type 7/8" - 9
2000 PSI Concrete - Pull-Out (lbs.) * 8392
2000 PSI Concrete - Shear (lbs.) * 18250
Type Male
Primary Concrete only
Diameter 7/8"
Length 8"
Material Carbon Steel Zinc Plated
Environment Dry
Box Qty 5
Minimum Spacing 8-3/4"
Minimum Edge Distance 4-3/8"
Maximum Fixture Thickness 3"
Minimum Fixture Hole Diameter (In Place) 1-1/8"
Minimum Fixture Hole Diameter (Hole Spotted) 7/8"
Length ID Code N
Maximum Torque 200 - 250 ft./lbs.
Wrench Size For Nut 1-5/16"
Length Measurement End to End
Country American Made
Brand Name ThunderStud
Application Video

Installation Video
Installing a 7/8" (eight inches) x 8" (eight inches) Zinc Plated Thunderstud Wedge Anchor
  1. Drill a 7/8" 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 3-7/8" is met.
  3. The hole can be drilled while the fixture is in place. The minimum hole in the fixture for the 7/8" (eight inches) x 8" (eight inches) Zinc Plated Thunderstud Wedge Anchor is 1-1/8".
  4. Clean the hole with a wire brush, vacuum, compressed air, or a blow-out bulb.
  5. Put the nut and washer on the 7/8" (eight inches) x 8" (eight inches) Zinc Plated Thunderstud 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 1-5/16" wrench, turn the nut 3 to 4 times until snug or until the proper torque value of 200 - 250 ft./lbs. is reached.
  10. Always use proper personal protective equipment per manufacturer's and OSHA instructions.

Product Reviews

* 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.



* The bits are recommended by diameter and may not necessarily be the length needed for your application. Please make sure the usable length will work for your application. *

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