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3/16" x 7/8" Hammer Drive Anchor, 100/Box

$13.60 per Box of 100
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   Availability: In Stock
  Questions? Email Mike

SKU: HD31678

CONFAST® - 3/16" x 7/8" Hammer Drive Anchor

The 3/16" x 7/8" Hammer Drive Anchors are preassembled and packaged with 100 pieces per box. They are a general purpose, light duty fastener that works well in most masonry materials. Because they are in stock, buy them at a significant savings that includes free freight and same day shipping.

  • Bit size 3/16"
  • Minimum embedment 3/4"
  • Large mushroom head
  • Not for overhead use
  • Zamac body is rust resistant
  • Tamper resistant head
  • No nuts or washer required
  • Fast and easy installation
  • 3/16" is the diameter x 7/8" is the length
  • Orders over $25.00 ship for free
Products specifications
Bit Size 3/16"
Minimum Embedment 3/4"
2000 PSI Concrete - Pull-Out (lbs.) * 214
2000 PSI Concrete - Shear (lbs.) * 311
Type Male
Diameter 3/16"
Length 7/8"
Material Zamac
Environment Dry
Box Qty 100
Minimum Spacing 1-7/8"
Minimum Edge Distance 15/16"
Maximum Fixture Thickness 1/8"
Minimum Fixture Hole Diameter (In Place) 1/4"
Minimum Fixture Hole Diameter (Hole Spotted) 1/4"
Head Type Mushroom
Length Measurement Underneath head
Brand Name CONFAST

The anchor is made from ZAMAC. This anchor is designed for use in Concrete, Block, and Brick.

The anchor is designed for use in a Dry environment.

Head Style
The anchor is a Mushroom head and is designed to allow the head to sit on top of the surface of the item being attached.

Hole Diameter/Bit Diameter
The anchor requires a 3/16" hole to be drilled in the base material (Concrete, Block, and Brick). 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 3/16".

Length Anchor
The length of the anchor is 7/8"

The anchor is packaged with 100 pieces per box .

Minimum Embedment
The minimum anchor embedment into the concrete is 3/4". Therefore, the anchor must be installed so that a minimum of 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 1/8". This will ensure that the minimum embedment of 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 3/16" diameter anchor requires the hole in the fixture to be 1/4".

Spacing between Anchors
Each anchor must be spaced a minimum distance of 1-7/8" from each other when measured center to center.

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

Holding Values - Ultimate Load Values in 2000 PSI Concrete

Anchor Size

Minimum Embedment

Pull-Out (lbs.)

Shear (lbs.)

3/16" x 7/8"




Installing a 3/16" x 7/8" Hammer Drive Anchor
  1. Drill a 3/16" 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 3/4" is met.
  3. The hole can be drilled while the fixture is in place. The minimum hole in the fixture for the 3/16" x 7/8" Hammer Drive Anchor is 1/4".
  4. Clean the hole with a wire brush, vacuum, compressed air, or a blow-out bulb.
  5. Insert the 3/16" x 7/8" Hammer Drive Anchor, slit end first, through the material to be fastened and into the hole, ensuring that the bottom of the head is sitting flush with the fixture plate.
  6. Hammer the nail flush into the head of the anchor body.
  7. Always use proper personal protective equipment per manufacturer's and OSHA instructions.

3/16" x 7/8" hammer drive - brick - conduit strap 1/4" x 7/8 hammer drive - brick - downspout 1/4" x 7/8 hammer drive - brick -building water pipe 1/4" x 7/8 hammer drive - block -conduit


Product/Company 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. *

These bits work with the selected anchor
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