Simpson Strong-Tie 5/16" x 2-1/2" Hex-Head Sleeve-All Expanding Anchor is a pre-assembled sleeve anchor engineered for reliable, long-term fastening in solid base materials such as concrete and brick. Designed by Simpson Strong-Tie, this carbon steel anchor with zinc plated finish delivers secure load transfer across a broad range of construction and repair applications - from structural infrastructure work to everyday DIY projects. The hex head configuration makes tightening straightforward with a standard 7/16" wrench, reducing installation time and effort on the job site.

Key Features

• Pre-assembled expanding sleeve design - arrives ready to install with no loose components to manage, streamlining the fastening process in solid base materials like concrete and masonry.
• Hex head style with 7/16" wrench size - pairs with standard tooling already on most job sites, eliminating the need for specialty installation equipment.
• 5/16" anchor diameter with matching 5/16" drill bit requirement - the hole and anchor diameter align precisely, ensuring a snug fit and reliable expansion for optimal holding performance.
• 1/4" bolt/rod diameter with 20 TPI threading - provides a secure, vibration-resistant threaded engagement compatible with standard 1/4"-20 hardware and fixtures.
• Carbon steel construction with zinc plated finish - combines structural strength with corrosion resistance, making this anchor suitable for both indoor applications and protected outdoor environments.
• Maximum fixture thickness of 1-1/16" - accommodates a practical range of structural members and mounting plates, offering versatility across common installation scenarios.

Why This Product

• The pre-assembled sleeve design means no loose parts during installation - critical when working overhead or in tight spaces where dropped components cause delays.
• The zinc plated carbon steel construction offers corrosion resistance in protected environments while maintaining the tensile strength needed for demanding structural anchoring tasks.
• With a hex head requiring only a standard 7/16" wrench, this anchor is compatible with the hand tools and impact drivers most crews already carry, reducing setup friction on complex or multi-trade job sites.
• Simpson Strong-Tie's Sleeve-All anchor line is built for a wide variety of solid base materials, making this a versatile single-anchor solution suitable across multiple base material types within one project.

Specifications

• Brand: Simpson Strong-Tie
• Diameter (in.): 5/16
• Bolt/Rod Diameter (in.): 1/4
• Drill Bit Diameter (in.): 5/16
• Head Type: Hex Head
• TPI: 20
• Max. Fixture Thickness (in.): 1 1/16
• Wrench Size (in.): 7/16
• Material: Carbon Steel
• Coating: Zinc Plated
• Finish: Zinc Plated
• Country of Origin: China

Available Pack Options

• SL31212HP1: 1 Ea
• SL31212H: 50 Pk
• SL31212H -5: 250 Pk

Frequently Asked Questions

What drill bit size do I need to install this sleeve anchor?

You will need a 5/16" drill bit to create the correct diameter hole for this anchor. The drill bit diameter matches the anchor diameter exactly, ensuring a proper fit and full sleeve expansion in the base material.

What wrench size is required to tighten this anchor?

A 7/16" wrench is required to tighten the hex head on this anchor. This is a common wrench size found in standard tool sets, so no specialty tooling is needed for installation.

What is the maximum fixture thickness this anchor can accommodate?

This anchor supports a maximum fixture thickness of 1-1/16 inches. Before installing, confirm that the material being fastened does not exceed this thickness to ensure proper engagement and holding strength.

What thread specification does this anchor use?

This anchor features a 1/4" bolt/rod diameter with 20 threads per inch (TPI), which is the standard 1/4"-20 thread specification. This makes it compatible with a wide range of off-the-shelf bolts, rods, and threaded hardware using the same thread pattern.

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