Also known as double expansion anchors, these expand from both sides for full contact and a secure hold. To install, tap into a drilled hole with a hammer and position your fixture. Then, insert a screw or threaded rod and tighten. For maximum expansion, the anchor should protrude slightly above the surface before threading the screw. Pull-out strength and shear strength values are 25% of the ultimate values.

3D CAD models availableFor technical drawings and 3-D models, click on a part number.

Strength, lbs.

Thread

Size Lg. Drill Bit

Size Min.

Installation Dp. Dia. Pull-Out Shear Tested In For Use In Pkg.

Qty. Pkg.

Zinc Alloy

1/4"-20 1 3/8" 1/2" 1 1/4" 1/2" 220 270 4,000 psi Concrete Block, Brick, Concrete 10 97031A039 $11.43

5/16"-18 1 5/8" 5/8" 1 1/2" 5/8" 370 500 4,000 psi Concrete Block, Brick, Concrete 10 97031A040 12.99

3/8"-16 2" 3/4" 1 3/4" 3/4" 500 750 4,000 psi Concrete Block, Brick, Concrete 5 97031A041 16.67

1/2"-13 2 1/2" 7/8" 2 1/4" 7/8" 870 1,000 4,000 psi Concrete Block, Brick, Concrete 1 97031A043 2.84

5/8"-11 2 3/4" 1" 2 1/2" 1" 1,500 2,500 4,000 psi Concrete Block, Brick, Concrete 4 97031A045 16.01

3/4"-10 3 15/16" 1 1/4" 3 1/2" 1 1/4" 2,000 3,300 4,000 psi Concrete Block, Brick, Concrete 1 97031A046 7.93