The Simpson Sleeve-All 3/8 in. x 4 in. Hex-Head Sleeve Anchor is a pre-assembled, expanding sleeve anchor engineered for reliable fastening in solid base materials such as concrete and brick. Built from zinc-plated carbon steel, this mechanical anchor is designed to install easily and perform consistently in demanding structural applications - from infrastructure and commercial construction to DIY projects that require a dependable hold in solid masonry.

Key Features

• Expanding sleeve anchor for solid base materials - mechanically locks into concrete, brick, and other solid substrates for a secure, load-bearing connection
• FM and UL approved with multiple DOT listings - meets rigorous third-party certification requirements, giving contractors and inspectors confidence on regulated and infrastructure projects
• Hex head style - compatible with standard 1/2 in. wrench tooling, making installation straightforward without specialty equipment
• Zinc-plated carbon steel construction - provides a corrosion-resistant finish suited to general-purpose structural fastening applications
• Pre-assembled design - arrives ready to install with no component sorting, reducing setup time on the job site
• Requires a precisely matched 3/8 in. drill bit - correct hole sizing is critical: an oversized hole will make it difficult to set the anchor and will reduce the anchor's load capacity

Why This Product

• Third-party approved for regulated applications - FM and UL approval combined with multiple DOT listings means this sleeve anchor can be specified with confidence on projects where certifications are required, not just assumed
• Engineered specifically for solid base materials - the expanding sleeve mechanism is optimized for concrete and brick, delivering optimal performance in the base materials where these connections are most commonly demanded
• Tool-friendly hex head simplifies installation - the hex head design works with a standard 1/2 in. wrench, so no specialty tooling is needed to drive and set the anchor correctly
• Trusted Simpson Strong-Tie engineering - Simpson anchoring products are designed to meet the performance demands of both complex structural applications and everyday fastening tasks, backed by a brand with deep roots in mechanical anchor development

Specifications

• Model No.: SL37400H
• Brand: Simpson Strong-Tie
• Size: 3/8 in. x 4 in.
• Head Type: Hex Head
• Material: Carbon Steel
• Coating / Finish: Zinc Plated
• Bolt / Rod Diameter: 5/16 in.
• Drill Bit Size: 3/8 in.
• Wrench Size: 1/2 in.
• TPI: 18
• Max. Fixture Thickness: 2-1/4 in.
• Packaging: Packs of 50 and Cartons of 200

Frequently Asked Questions

What base materials is the SL37400H Sleeve-All anchor rated for?

The Sleeve-All SL37400H is an expansion anchor designed for use in all types of solid base materials, including concrete and brick. It is not intended for hollow or unsupported base materials.

What drill bit size should be used when installing the SL37400H?

A 3/8 in. drill bit should be used to prepare the hole. Using an oversized hole will make it difficult to properly set the anchor and will reduce the anchor's load capacity.

What wrench size is required to install this hex-head sleeve anchor?

A 1/2 in. wrench is required to drive and set the hex-head on the SL37400H sleeve anchor during installation.

Does the Simpson SL37400H carry any third-party approvals or certifications?

Yes. The Sleeve-All SL37400H is FM and UL approved and carries multiple DOT listings, making it suitable for a wide range of regulated structural and infrastructure applications.

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