The Simpson 5/16 in. x 3-1/2 in. Phillips Flat-Head Sleeve-All Anchor is a pre-assembled, expanding sleeve anchor from Simpson engineered for secure fastening in solid base materials such as concrete and brick. Built from zinc-plated carbon steel, it delivers dependable holding strength across a wide range of structural and general construction applications - from demanding infrastructure projects to everyday do-it-yourself work.

Key Features

• Pre-assembled expanding sleeve design - arrives ready to install with no separate components to manage, saving setup time on the job site
• Phillips flat head - compatible with standard Phillips drivers for fast, tool-accessible installation in flush or countersunk applications
• Rated for solid base materials - engineered specifically for concrete, brick, and similar solid substrates, giving installers confidence in a wide range of anchoring scenarios
• Zinc-plated carbon steel construction - the protective zinc plating resists corrosion while the carbon steel core provides the structural strength needed for demanding applications
• Requires a 5/16 in. drill bit - precise hole sizing is critical; an accurately drilled hole ensures the sleeve sets correctly and maintains full load capacity
• Caution: Oversized holes will make it difficult to set the anchor and will reduce the anchor's load capacity - proper hole diameter must be maintained to achieve rated performance

Why This Product

• Trusted engineering for structural applications - Simpson mechanical anchors are designed to perform in demanding structural environments, making this sleeve anchor a reliable choice when holding strength cannot be compromised
• Versatile fit for a broad range of projects - whether the task involves heavy construction or a home improvement project, this anchor is suited for both professional contractors and capable do-it-yourselfers working in solid base materials
• Simplified installation through pre-assembly - the anchor arrives as a complete, ready-to-use unit, reducing installation steps and minimizing the chance of assembly errors in the field
• Corrosion-resistant finish for lasting performance - the zinc-plated finish provides a layer of protection against corrosion, helping the anchor maintain integrity in the base material over the long term

Specifications

• MPN: SL31312PF
• Brand: Simpson Strong-Tie
• Diameter: 5/16 in.
• Length: 3-1/2 in.
• Head Type: Phillips Flat Head
• Bolt/Rod Diameter: 1/4 in.
• Drill Bit Size: 5/16 in.
• TPI: 20
• Material: Carbon Steel
• Coating/Finish: Zinc Plated
• Packaging: Packs of 50 and Cartons of 250

Frequently Asked Questions

What base materials is the SL31312PF Sleeve-All anchor compatible with?

This anchor is designed for use in all types of solid base materials, including concrete and brick, making it suitable for a broad range of structural and general construction applications.

What drill bit size is required to install this anchor?

A 5/16 in. drill bit is required for proper installation. 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 material and finish is this anchor made from?

The SL31312PF is constructed from zinc-plated carbon steel, providing a corrosion-resistant finish suited for demanding structural applications.

What head style does the SL31312PF feature, and what bolt diameter does it accommodate?

This anchor features a Phillips flat head and is designed to accommodate a 1/4 in. bolt or rod diameter, with 20 TPI threading.

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