Anchors/5/8" Drop-In Anchor

Drop-In Anchor

5/8" Drop-In Anchor

Quick Answer

A 5/8" Drop-In Anchor needs a 7/8" pilot hole, drilled to 2" minimum, with 2-1/2" minimum embedment, torqued to Set with setting tool; 30 ft-lbs max on the bolt.

Pilot Hole

7/8"

Embedment

2-1/2" minimum (sits flush with surface)

Torque

Set with setting tool; 30 ft-lbs max on the bolt

Safe Load

831 lbs

Where to Buy

Budget pick

Wensilon Knurled Drop-In Anchor Assortment (Multiple Sizes)

Multiple sizes · 20 or 100-pack · zinc knurled

★ 4.2 (240)

Check price on Amazon

Required tool

Drop-In Anchor Setting Tool (Multiple Thread Sizes)

1/4"-20 to 5/8"-11 · zinc-plated carbon steel

★ 4.7 (64)

Check price on Amazon

As an Amazon Associate, BuildToolHQ earns from qualifying purchases. Specifications are for guidance only — always verify against the anchor manufacturer's ICC-ES ESR report and local building codes.

Full Specification

Type

Drop-In Anchor

Diameter

5/8"

Available Lengths

1-5/8" shell

Pilot Hole Diameter

7/8"

Pilot Hole Depth

2" minimum

Embedment Depth

2-1/2" minimum (sits flush with surface)

Recommended Torque

Set with setting tool; 30 ft-lbs max on the bolt

Compatible Substrates

Solid concrete only

Load Rating

831 lbs tension safe working load — Ultimate: 3,323 lbs tension — Ultimate values in 2000 PSI concrete (Confast). Allowable calculated at the industry-standard 4:1 safety factor. — Confast publishes no shear value for drop-in anchors.

Material

Zinc-plated steel, Stainless steel

Removable

No — permanent installation

Best For

✓Heavy industrial overhead equipment
✓Crane rail anchoring
✓Large mechanical pipe hangers
✓Structural suspended connections

Not For

✗Hollow block
✗Brick
✗Residential applications
✗Any use without engineer specification

How a Drop-In Anchor Grips

A drop-in anchor is an internally threaded steel body that expands when a setting tool drives its internal plug outward against the hole wall. It cannot grip without being set: dropping it in the hole and threading a bolt in is not an installation, which is why the setting tool is a requirement, not an accessory.

Installation Tips

1.Requires SDS-Max rotary hammer for 7/8" hole — SDS-Plus struggles at this diameter

2.Setting tool must be rated for 5/8" drop-ins — do not use smaller setting tools

3.Engineer specification required for all overhead applications

4.Used with 5/8-11 threaded rod — standard for heavy structural suspended systems

5.Inspect setting tool condition before use — worn tools lead to under-set anchors

Frequently Asked Questions

What size drill bit does a 5/8" Drop-In Anchor need?

Use a 7/8" carbide masonry bit, drilled to 2" minimum.

How much weight can a 5/8" Drop-In Anchor hold?

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