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Full Specification

Type

Wedge Anchor

Diameter

3/8"

Available Lengths

2-1/4", 3", 3-1/2", 4", 5", 6"

Pilot Hole Diameter

3/8"

Pilot Hole Depth

Embedment + 1/2" clearance

Embedment Depth

1-1/2" minimum

Recommended Torque

25-30 ft-lbs

Compatible Substrates

Solid concrete only

Load Rating

306 lbs tension, 810 lbs shear safe working load — Ultimate: 1,223 lbs tension / 3,238 lbs shear — Ultimate values in 2000 PSI concrete (Confast). Allowable calculated at the industry-standard 4:1 safety factor.

Material

Zinc-plated steel, Hot-dip galvanized, 316 Stainless steel

Removable

No — permanent installation

Best For

✓Structural steel
✓Heavy machinery
✓Railing posts
✓Column base plates

Not For

✗Hollow block
✗Brick
✗Cracked concrete zones
✗Near edges without reduction

How a Wedge Anchor Grips

A wedge anchor grips by flaring an expansion clip against the hole wall as the nut is torqued, converting clamping tension into outward friction. Unlike a self-tapping screw, the hole is drilled at the anchor's own diameter, and grip quality depends heavily on a clean, correctly-sized, dust-free hole.

Installation Tips

1.Drill the hole the same diameter as the anchor — 3/8" bit for 3/8" anchor

2.Minimum 5 diameters from edge (1-7/8") — capacity reduces at tighter spacing

3.Minimum concrete thickness: embedment depth + 4× diameter (3.75" for 2-1/4" embed)

4.Cannot be removed once set — plan your layout carefully

5.Use HDG or stainless for exterior or wet locations

Frequently Asked Questions

What size drill bit does a 3/8" Wedge Anchor need?

Use a 3/8" carbide masonry bit, drilled to embedment + 1/2" clearance.

How much weight can a 3/8" Wedge Anchor hold?

306 lbs tension, 810 lbs shear safe working load. Actual capacity depends on base material strength and embedment — verify against the manufacturer's ICC-ES ESR data for structural work.