The Simpson Sleeve-All 5/16 in. x 2-1/2 in. Phillips Flat-Head Sleeve Anchor is a pre-assembled, expanding sleeve anchor from Simpson engineered for reliable fastening in all types of solid base materials, including concrete and brick. Designed to install easily and securely, it delivers optimal performance across demanding structural applications as well as everyday do-it-yourself projects, with a flush-sitting flat head that keeps finished surfaces clean and professional.

Key Features

• Expansion anchor for solid base materials - grips firmly in concrete, brick, and similar solid substrates, giving you a dependable hold in the base materials most commonly encountered in structural anchoring work
• Phillips flat head - compatible with standard Phillips-drive bits for fast installation and sits flush with or below the fixture surface for a clean, low-profile finish
• 5/16 in. x 2 1/2 in. sizing with 5/16 in. drill bit requirement - drill bit and anchor diameter match exactly, so hole preparation is straightforward and guesswork is eliminated
• Zinc-plated carbon steel construction - combines the structural strength of carbon steel with a zinc-plated finish that resists corrosion across a wide range of anchoring environments
• Pre-assembled design - arrives ready to drive without any component assembly on the job site, reducing installation time and minimizing the chance of setup errors
• Caution: oversized holes will make it difficult to set the anchor and will reduce the anchor's load capacity - always use the specified 5/16 in. drill bit to maintain proper fit and full rated performance

Why This Product

• Engineered by Simpson for demanding applications - Simpson mechanical anchors are designed to perform in the most demanding structural applications, so contractors and builders can specify this anchor with confidence on projects where reliable load capacity matters
• Pre-assembled for job-site efficiency - because the expanding sleeve comes factory-assembled, you spend less time on component prep and more time on the work, a practical advantage on busy job sites and multi-anchor installations alike
• Flush-mount head for versatile fixture work - the Phillips flat-head style allows the anchor to sit flush or countersunk at the fixture surface, making it well-suited for applications where a protruding fastener head would be impractical or undesirable
• Exact-fit hole sizing keeps performance intact - the anchor is engineered to work with a 5/16 in. drill bit that matches its 5/16 in. diameter, ensuring the expansion sleeve seats correctly and the anchor achieves its intended holding strength in solid base materials

Specifications

• Model Number: SL31212PF
• Diameter: 5/16 in.
• Length: 2-1/2 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 Simpson SL31212PF Sleeve-All anchor designed for?

The SL31212PF 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 voids within the base material.

What size drill bit is required to install this anchor?

A 5/16 in. drill bit is required to create the correct diameter hole for this anchor. Using an oversized hole will make it difficult to properly set the anchor and will reduce its load capacity.

What is the head style and drive type of this anchor?

This Sleeve-All anchor features a Phillips flat head, making it compatible with standard Phillips-drive bits or screwdrivers and allowing the head to sit flush with or below the fixture surface when fully installed.

What material and coating does the SL31212PF feature?

The SL31212PF is constructed from carbon steel with a zinc-plated finish, providing a combination of strength and corrosion resistance suitable for a wide range of structural anchoring applications.

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