The Simpson Sleeve-All Acorn-Head Sleeve Anchor is a pre-assembled, expanding sleeve anchor from Simpson engineered for secure mechanical fastening in solid base materials such as concrete and brick. Built from zinc-plated carbon steel and featuring a finished acorn head, this anchor is equally at home on demanding structural installations and everyday do-it-yourself projects, delivering consistent, reliable holding performance wherever a clean, finished look is required.

Key Features

• Expanding sleeve anchor design for solid base materials - locks firmly into concrete, brick, and similar solid substrates, giving you a mechanically secure connection with no adhesive or mixing required
• Pre-assembled construction - arrives ready to install straight out of the pack, reducing setup time and minimizing the chance of assembly errors on the job
• Acorn head style - provides a smooth, rounded, finished appearance once set, making it well suited for visible or exposed fastening applications where aesthetics matter
• Zinc-plated carbon steel construction - the protective zinc coating helps resist corrosion in typical interior and sheltered installations, extending the service life of each anchor
• 1/4 in. drill bit requirement and precise hole sizing - the anchor is sized to match a 1/4 in. drilled hole exactly; maintaining correct hole diameter is critical because oversized holes will make it difficult to set the anchor and will reduce the anchor's load capacity
• 3/8 in. wrench installation - a standard, commonly available wrench size means no specialized tooling is needed to drive and tighten each anchor

Why This Product

• Trusted Simpson engineering across a wide range of applications - Simpson offers a wide variety of anchoring products to meet virtually any need, and the Sleeve-All line is specifically designed to perform in the most demanding structural applications as well as straightforward DIY tasks
• Simplified, consistent installation - the pre-assembled expanding sleeve design eliminates on-site assembly steps, so each anchor installs the same way every time, reducing variability and installation errors on multi-anchor projects
• Clean finished look without extra hardware - the acorn head style delivers a polished, domed profile flush to the surface, removing the need for separate caps or covers when appearance is part of the requirement
• Optimized for solid masonry fastening - purpose-built for solid base materials including concrete and brick, this anchor provides optimal performance in the exact conditions where sleeve anchors are most commonly needed in both infrastructure and general-purpose work

Specifications

• MPN: SL25138A
• Brand: Simpson Strong-Tie
• Anchor Type: Sleeve-All Expanding Sleeve Anchor
• Head Type: Acorn Head
• Size: 1/4 in. x 1-3/8 in.
• Diameter: 1/4 in.
• Bolt/Rod Diameter: 3/16 in.
• TPI: 24
• Drill Bit Size: 1/4 in.
• Wrench Size: 3/8 in.
• Material: Carbon Steel
• Coating/Finish: Zinc Plated
• Packaging: Packs of 100 and Cartons of 500

Approved Applications

• Concrete - solid base material fastening for structural and general-purpose installations
• Brick - secure anchoring in solid masonry surfaces
• Grouted CMU - suitable for grouted concrete masonry unit applications
• Infrastructure projects requiring reliable mechanical anchor performance
• Do-it-yourself installations requiring easy, pre-assembled anchor solutions

Frequently Asked Questions

What base materials is the Simpson SL25138A Sleeve-All anchor compatible with?

This anchor is designed for use in all types of solid base materials, including concrete and brick. It is not intended for use in hollow base materials.

What size drill bit is required to install the SL25138A anchor?

A 1/4 in. drill bit is required to prepare the hole for this anchor. Using an oversized hole will make it difficult to set the anchor and will reduce the anchor's load capacity, so precise hole sizing is essential.

What wrench size is needed to tighten the SL25138A anchor?

A 3/8 in. wrench is used to install and tighten the SL25138A Sleeve-All anchor during installation.

What material and finish does the SL25138A anchor feature?

The SL25138A is constructed from carbon steel with a zinc-plated finish, which provides corrosion resistance and added durability for a variety of installation environments.

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