Sleeve Anchors, 304 Stainless Steel, 1/2" Diameter – Available Lengths

How a Sleeve Anchor Works

Tightening the nut draws a cone up into a split sleeve, expanding it against the hole wall. Because the sleeve spreads the load over a long contact area rather than a single point, a sleeve anchor holds in hollow block and brick where a wedge anchor will not. That versatility across base materials is the reason to reach for one.

At 1/2" diameter these are the heaviest of the Sleeve-All range we stock — machinery bases, ledgers, structural standoffs. For lighter fixtures, the 3/8" diameter covers the same base materials at lower cost.

Why 304 Stainless

The whole anchor — bolt, sleeve, nut and washer — is 304 stainless, not plated carbon steel. That suits damp interiors, covered exterior work and coastal air. For direct salt spray or splash-zone exposure, step up to 316.

Installation

1. Drill a 1/2" hole with a carbide bit, to the embedment depth plus room for drilling dust. Blow the hole clean.
2. Assemble the fixture over the hole and drive the anchor through it until the washer seats against the fixture.
3. Tighten the nut to the required installation torque. Do not over-tighten — an oversized or over-torqued hole reduces holding capacity.

Frequently Asked Questions

What size hole does a 1/2" sleeve anchor need?

A 1/2" carbide bit — the hole matches the anchor diameter, unlike a concrete screw where the bit is smaller than the screw. Drill deep enough for the embedment plus the dust.

Can I use these in hollow block?

Yes. Sleeve anchors are one of the few mechanical anchors rated for hollow CMU as well as grout-filled block, brick and solid concrete.

Can a sleeve anchor be removed?

The nut comes off, but the expanded sleeve stays in the hole. Treat it as permanent.