Simpson Strong-Tie 1/4" x 2-1/4" Acorn-Head Sleeve-All Expanding Sleeve Anchor is a pre-assembled, zinc plated carbon steel sleeve anchor engineered for secure, reliable fastening into solid base materials such as concrete and brick. The acorn head style provides a finished, rounded appearance while still delivering the strong mechanical expansion performance that makes Sleeve-All anchors a trusted choice across both professional construction projects and demanding do-it-yourself applications. With a 1/4" diameter and a thread pitch of 24 TPI, this expanding sleeve anchor installs cleanly with a standard 1/4" drill bit and a 3/8" wrench, making it a practical fastening solution for a wide variety of structural and general anchoring tasks.

Key Features

• Acorn Head Style - delivers a clean, rounded finished appearance at the fastener head, suitable for visible applications where aesthetics and safety matter
• Pre-Assembled Expanding Sleeve Design - the anchor arrives ready to install with no additional assembly required, saving time and reducing setup steps on the job site
• Zinc Plated Carbon Steel Construction - provides corrosion resistance in typical indoor and protected outdoor environments while maintaining strong structural integrity under load
• 1/4" Drill Bit Diameter - matches the anchor's diameter exactly for a properly sized hole and optimal sleeve expansion and holding strength in solid base materials
• 3/8" Wrench Size - compatible with common hand and power tools, allowing for fast, straightforward installation without specialized equipment
• 24 TPI Thread Pitch - fine thread engagement supports secure clamping and reduces the chance of loosening under vibration or repeated load cycles
• Maximum Fixture Thickness of 1-1/8" - accommodates a range of material thicknesses for versatile use across different mounting and anchoring configurations
• 3/16" Bolt Diameter - sized for light to medium duty anchoring loads in solid concrete, brick, and masonry base materials

Why This Product

• The pre-assembled expanding sleeve means the anchor is ready to drop into a drilled hole and set immediately - no loose components to manage or assemble on site, reducing installation errors and saving time during concrete and masonry anchoring work.
• The zinc plated finish on carbon steel protects the anchor against moisture and corrosion in typical protected environments, making it a dependable fastener for both interior concrete applications and covered exterior structural attachments.
• With a 1/4" diameter matched precisely to a standard 1/4" drill bit, this anchor simplifies the hole preparation step - one common bit size is all that's needed, eliminating guesswork and reducing the number of tools required on the job.
• The acorn head profile serves double duty: it covers the bolt end for a safer, snag-free surface and provides a neater finished look compared to hex or flat head alternatives, making it well suited for visible or public-facing installation locations.

Specifications

• Brand: Simpson Strong-Tie
• Head Type: Acorn Head
• Diameter: 1/4 in.
• Bolt/Rod Diameter: 3/16 in.
• Drill Bit Diameter: 1/4 in.
• Wrench Size: 3/8 in.
• TPI: 24
• Max. Fixture Thickness: 1-1/8 in.
• Material: Carbon Steel
• Coating: Zinc Plated
• Finish: Zinc Plated
• Country of Origin: China

Available Pack Options

• SL25214AP1: 1 Ea
• SL25214A: 100 Pk
• SL25214A -5: 500 Pk

Frequently Asked Questions

What base materials are Sleeve-All expanding anchors designed for?

Sleeve-All expanding anchors are designed for use in all types of solid base materials, including concrete and brick. They are not intended for hollow or unsupported cavities - solid material contact is required for proper sleeve expansion and load transfer.

What drill bit size should I use to install this anchor?

Use a 1/4" drill bit to prepare the hole for this anchor. The drill bit diameter matches the anchor's 1/4" diameter, which ensures the sleeve has the correct fit for proper mechanical expansion during installation.

What wrench size is needed to tighten this Sleeve-All anchor?

A 3/8" wrench is required to tighten the acorn head on this Sleeve-All anchor. This is a standard size compatible with common hand wrenches and socket sets, making installation straightforward without any specialized tooling.

What is the maximum fixture thickness this anchor can accommodate?

This anchor supports a maximum fixture thickness of 1-1/8". Be sure the material being fastened does not exceed this thickness so that the anchor thread engages properly and the sleeve expands fully within the base material for a secure hold.

Note: Product dimensions and/or thread length may differ from picture. Please see the item description above for specifications.