System of Measurement System of Measurement |
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Anchor Type Anchor Type |
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![]() | Female Threaded |
Material Material |
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Pull-Out Strength Pull-Out Strength |
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Shear Strength Shear Strength |
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Removable Removable |
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Thread Fit Thread Fit |
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Drill Bit Decimal Size Equivalent Drill Bit DecimalSize Equivalent |
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Thread Direction Thread Direction |
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Thread Type Thread Type |
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Thread Spacing Thread Spacing |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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Vibration-Resistant Female-Threaded Anchors for Block and Brick

Often referred to as four-way expansion anchors, these expand in four directions to resist loosening from vibration. To install, tap into a drilled hole with a hammer and position your fixture. Then, insert a screw or threaded rod and tighten. Pull-out strength and shear strength values are 25% of the ultimate values.
For technical drawings and 3-D models, click on a part number.
Strength, lbs. | |||||||||||
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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 1/4" | 1/2" | 1 1/4" | 1/2" | 580 | 520 | 3,000 psi Concrete | Block, Brick, Concrete, Stone | 10 | 000000000 | 000000 |
5/16"-18 | 1 1/2" | 9/16" | 1 1/2" | 9/16" | 650 | 820 | 3,000 psi Concrete | Block, Brick, Concrete, Stone | 10 | 000000000 | 00000 |
3/8"-16 | 1 3/4" | 11/16" | 1 3/4" | 11/16" | 900 | 960 | 3,000 psi Concrete | Block, Brick, Concrete, Stone | 10 | 000000000 | 00000 |
1/2"-13 | 2 1/4" | 7/8" | 2 1/4" | 7/8" | 1,200 | 2,000 | 3,000 psi Concrete | Block, Brick, Concrete, Stone | 4 | 000000000 | 00000 |
5/8"-11 | 2 5/8" | 1 1/8" | 2 5/8" | 1 1/8" | 1,400 | 3,500 | 3,000 psi Concrete | Block, Brick, Concrete, Stone | 1 | 000000000 | 0000 |
3/4"-10 | 3 1/8" | 1 1/4" | 3 1/8" | 1 1/4" | 2,400 | 3,800 | 3,000 psi Concrete | Block, Brick, Concrete, Stone | 1 | 000000000 | 00000 |