The Simpson 3/8 in. x 4 in. Phillips Flat-Head Sleeve-All Anchor is a pre-assembled, expanding sleeve anchor built for reliable fastening in all types of solid base materials, including concrete and brick. Engineered by Simpson Strong-Tie to perform across a wide range of structural applications - from complex infrastructure projects to everyday do-it-yourself ventures - this anchor combines a flush-sitting flat-head profile with proven expansion mechanics to deliver consistent, secure holding power where it matters most.

Key Features

• Expansion anchor for solid base materials - designed specifically for concrete, brick, and other solid substrates, giving installers confidence that the anchor will grip firmly without compromise
• FM and UL approved with multiple DOT listings - meets rigorous third-party safety and performance standards, making it suitable for regulated structural, commercial, and infrastructure applications
• Phillips flat-head style - sits flush with the fixture surface for a clean, low-profile finish that works well in applications where a protruding head is not desirable
• Pre-assembled construction - arrives ready to install with no separate components to manage on the job site, reducing setup time and the chance of missing parts
• Zinc-plated carbon steel - the zinc plating provides a level of corrosion resistance appropriate for the anchor's intended solid base material applications, while the carbon steel core delivers structural integrity
• Requires a 3/8 in. drill bit for proper installation - using the correctly sized bit is critical, as oversized holes will make it difficult to set the anchor and will reduce the anchor's load capacity

Why This Product

• Engineered for demanding applications - Simpson Strong-Tie designed the Sleeve-All line to perform in the most demanding structural environments, so whether the job involves infrastructure work or a straightforward concrete fastening task, this sleeve anchor is built to hold
• Third-party approved for regulated projects - FM and UL approval combined with multiple DOT listings means this expanding anchor meets the documentation requirements many commercial, municipal, and infrastructure projects demand
• Pre-assembled for jobsite efficiency - the ready-to-install design eliminates extra assembly steps, helping contractors and DIYers drive installations faster without sacrificing the secure, mechanical expansion performance the anchor is built around
• Versatile flat-head profile - the Phillips flat-head configuration accommodates a max fixture thickness of 2 1/2 in. and delivers a flush-mount result, making this sleeve anchor a practical choice for a wide range of concrete and masonry fastening needs

Specifications

• Model Number (MPN): SL37400PF
• Brand: Simpson Strong-Tie
• Size: 3/8 in. x 4 in.
• Head Type: Phillips Flat Head
• Material: Carbon Steel
• Coating/Finish: Zinc Plated
• Diameter: 3/8 in.
• Bolt/Rod Diameter: 5/16 in.
• Drill Bit Size: 3/8 in.
• TPI: 18
• Packaging: Packs of 50 and Cartons of 200

Frequently Asked Questions

What base materials is the SL37400PF Sleeve-All anchor designed for?

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

What drill bit size is required to install this anchor?

A 3/8 in. drill bit is required for proper installation of the SL37400PF. It is important to avoid oversized holes, as they will make it difficult to set the anchor and will reduce the anchor's load capacity.

What approvals and certifications does this anchor carry?

The Simpson Strong-Tie Sleeve-All anchor is FM and UL approved and holds multiple DOT listings, making it suitable for a wide range of regulated structural and infrastructure applications.

What material and finish is used on the SL37400PF?

The SL37400PF is constructed from zinc-plated carbon steel. The zinc plating provides a level of corrosion resistance suitable for the anchor's intended use in solid base material applications.

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