The Simpson 3/8 in. x 1-7/8 in. Hex-Head Stainless-Steel Sleeve-All Anchor is a pre-assembled, expanding sleeve anchor from Simpson built for reliable fastening in all types of solid base materials, including concrete and brick. Constructed from Type 304 stainless steel, it delivers long-lasting corrosion resistance and consistent holding power across demanding structural applications - from complex infrastructure projects to everyday do-it-yourself work. The hex-head design installs quickly with a standard 1/2 in. wrench, making this sleeve anchor a practical choice for professionals and experienced DIYers who need a dependable, code-compliant fastening solution.

Key Features

• Expanding sleeve anchor for solid base materials - anchors securely in concrete, brick, and similar solid substrates, giving you a firm, stable hold without the need for adhesive or additional hardware
• FM and UL approved with multiple DOT listings - meets verified performance standards and regulatory requirements, so you can use this anchor with confidence on jobs where compliance documentation matters
• Hex-head design with 1/2 in. wrench size - installs using a common 1/2 in. wrench, reducing the need for specialty tools and speeding up installation on larger projects
• Type 304 stainless steel construction - resists corrosion in exposed or moisture-prone environments, making this anchor suitable for outdoor, coastal, and high-humidity applications where carbon steel would degrade over time
• Pre-assembled design - arrives ready to install with no additional assembly required, saving setup time and reducing the chance of installation errors in the field
• Requires a precisely drilled 3/8 in. hole - correct hole sizing is critical to achieving full load capacity; oversized holes will make it difficult to set the anchor and will reduce the anchor's load capacity

Why This Product

• Engineered for demanding structural applications - Simpson designed the Sleeve-All anchor line to perform in high-stress fastening scenarios, and the FM and UL approvals with multiple DOT listings back that up with third-party verified performance standards
• Corrosion-resistant stainless steel extends service life - the Type 304 stainless steel material provides reliable protection against rust and deterioration, making these concrete sleeve anchors a sound long-term investment for exposed or outdoor installations
• Straightforward installation reduces labor time - the pre-assembled, expanding sleeve design combined with a standard hex head means this anchor goes in fast using tools already on hand, keeping your project moving without delays
• Broad application versatility from a trusted manufacturer - Simpson offers a full anchoring product lineup for a wide variety of base materials and head styles, and the Sleeve-All series sits at the center of that offering as a proven, widely used expanding anchor for solid base material applications

Specifications

• MPN: SL37178HSS
• Brand: Simpson Strong-Tie
• Size: 3/8 in. x 1-7/8 in.
• Head Type: Hex Head
• Material: Type 304 Stainless Steel
• Finish: Type 304 Stainless Steel
• Diameter: 3/8 in.
• Bolt/Rod Diameter: 5/16 in.
• Drill Bit Size: 3/8 in.
• Wrench Size: 1/2 in.
• TPI: 18
• Packaging: Packs of 50 and Cartons of 250

Frequently Asked Questions

What base materials is the SL37178HSS Sleeve-All anchor suitable for?

This anchor is designed for use in all types of solid base materials, including concrete and brick. It is not intended for hollow or grouted CMU applications - those require a different anchor type from the Simpson Strong-Tie lineup.

What drill bit size should I use when installing this sleeve anchor?

A 3/8 in. drill bit is required to create the correct hole diameter for the SL37178HSS. It is important to avoid drilling an oversized hole, as this will make it difficult to set the anchor and will reduce its load capacity.

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

A 1/2 in. wrench is required to tighten and set the hex-head on the SL37178HSS sleeve anchor during installation.

Is this anchor approved for regulated or code-required applications?

Yes. The Simpson Strong-Tie Sleeve-All SL37178HSS is FM and UL approved and carries multiple DOT listings, making it suitable for use in applications where verified performance standards and regulatory compliance are required.

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