Sleeve Anchor Selection and Installation Guide
Sleeve anchors are one of the most versatile mechanical concrete fasteners available. Unlike wedge anchors, which only work in solid concrete, sleeve anchors can be used in concrete, concrete block (CMU), brick, and stone. They provide moderate holding strength and are a practical choice for a wide range of commercial, industrial, and residential applications. This guide covers how sleeve anchors work, how to choose the right size and head style, step-by-step installation, and load data from the Simpson Strong-Tie Sleeve-All product line.
In This Guide:
- How Does a Sleeve Anchor Work?
- Head Style Options
- Choosing the Right Sleeve Anchor
- Installation Data by Diameter
- Step-by-Step Installation
- Allowable Load Tables
- Sleeve Anchors in Masonry (CMU)
- Edge Distance & Spacing
- Materials and Finishes
- Sleeve Anchor vs. Other Anchors
- Frequently Asked Questions
How Does a Sleeve Anchor Work?
A sleeve anchor consists of a threaded bolt body surrounded by a thin metal expansion sleeve. At the base of the bolt is a small expander cone. When the nut is tightened, the bolt is drawn upward and the cone is pulled into the bottom of the sleeve, forcing it to expand outward against the walls of the drilled hole. This expansion creates friction and mechanical interlock that holds the anchor in place.
The key difference between a sleeve anchor and a wedge anchor is where the expansion happens. A wedge anchor expands only at the very bottom of the hole, which requires solid material to grip against. A sleeve anchor expands along the full length of the sleeve, which means it can grip in both solid and hollow materials. This makes sleeve anchors the preferred choice when anchoring into concrete block, brick, or stone — materials where wedge anchors would fail.
Sleeve anchors are considered partially removable. You can remove the nut and washer to release the fixture, but the sleeve body remains embedded in the base material. The bolt can sometimes be reinserted through a new fixture, but the anchor cannot be fully extracted and reused.
Sleeve Anchor Head Styles
Sleeve anchors are available in four head styles, each designed for different applications and installation requirements. Choosing the right head style affects both the appearance and functionality of the finished connection.
| Head Style | Best For | Notes |
|---|---|---|
| Hex Head | General construction, equipment mounting, brackets, handrails, structural connections | Most common style. Hex nut sits above the fixture surface. Tightened with a standard wrench or socket. Available in the widest range of sizes. |
| Acorn Head | Finished surfaces, handrails, signage, decorative fixtures | Rounded, capped nut provides a finished appearance and protects the bolt threads from corrosion and weather. Same installation as hex head. |
| Phillips Flat Head | Flush-mount applications, electrical boxes, light fixtures, conduit straps | Countersunk head sits flush with or below the fixture surface. Installed with a Phillips screwdriver or driver bit. Available in smaller diameters (1/4" and 3/8"). |
| Rod Coupler | Threaded rod connections, overhead hangers, suspended ceilings, pipe supports | Internally threaded coupling allows a length of threaded rod to be attached. Useful for hanging applications where you need adjustable height. Available in 3/8", 1/2", and 5/8" diameters. |
For most structural and general construction applications, hex head is the standard choice. Use acorn head anywhere appearance matters or the anchor will be exposed to weather. Use flat head when the anchor head must sit flush with the surface. Use rod coupler when connecting threaded rod for hanging or suspension applications.
Choosing the Right Sleeve Anchor
Selecting the correct sleeve anchor involves matching four factors to your application: diameter, length, head style, and material.
Diameter
Sleeve anchors are available in standard fractional diameters from 1/4" through 3/4". The diameter determines the drill bit size, the holding capacity, and the required edge distances.
- 1/4" to 5/16" — Light duty: electrical boxes, conduit straps, cable trays, light fixtures, small brackets
- 3/8" — Medium duty: handrails, signage, shelving, mechanical supports, HVAC hangers
- 1/2" to 5/8" — Heavy-medium duty: equipment pads, large brackets, structural connections, pipe supports
- 3/4" — Heavy duty: steel columns, base plates, large equipment, guardrails
Length
The overall anchor length must account for three measurements added together: the thickness of the material being fastened (bracket, base plate, angle, etc.), plus the minimum embedment depth into the base material, plus enough thread projection for the nut and washer. As a rule of thumb, the embedment depth should be at least 4 to 6 bolt diameters. Always check the manufacturer’s minimum embedment for your specific diameter.
Base Material
Sleeve anchors work in solid concrete, concrete block (CMU), brick, and natural stone. However, the allowable loads differ significantly depending on the base material. Solid concrete provides the highest holding values, followed by grout-filled CMU, and then hollow block. Always use load tables specific to your base material when calculating design loads. See the load tables and masonry section below.
Sleeve Anchor Installation Data by Diameter
The table below provides the key installation specifications for Simpson Strong-Tie Sleeve-All anchors across all available diameters. Use this as a quick reference when selecting your drill bit, determining embedment, and setting your torque wrench.
| Anchor Diameter | Drill Bit Size | Install Torque (ft-lbs) | Wrench Size1 | Coupler Nut Wrench |
|---|---|---|---|---|
| 1/4" | 1/4" | 5 | 3/8" | — |
| 5/16" | 5/16" | 8 | 7/16" | 1/2" |
| 3/8" | 3/8" | 15 | 1/2" | 5/8" |
| 1/2" | 1/2" | 25 | 9/16" | 5/8" |
| 5/8" | 5/8" | 50 | 3/4" | 3/4" |
| 3/4" | 3/4" | 90 | 15/16" | — |
1 Wrench size applies to acorn head and hex head configurations. Phillips flat head anchors are installed with a #2 or #3 Phillips driver bit.
Note: The drill bit diameter for a sleeve anchor matches the nominal anchor diameter. Use a carbide-tipped SDS-plus or SDS-max rotary hammer drill bit for best results. For more drill bit information across all concrete anchor types, see our Concrete Anchor Drill Bit & Hole Size Chart.
How to Install a Sleeve Anchor
Follow these steps for a proper sleeve anchor installation. The process is similar for all head styles and diameters.
Step 1: Drill the Hole
Using a carbide-tipped drill bit that matches the anchor diameter, drill a hole into the base material. The hole depth must be at least as deep as the anchor embedment depth. Drill the hole 1/2" deeper than the minimum embedment to leave space for concrete dust at the bottom.
Step 2: Clean the Hole
Blow the hole clean using compressed air to remove concrete dust and debris. For non-overhead installations, use a nylon hole-cleaning brush to loosen dust from the walls, then blow it out. Dust left in the hole will prevent the sleeve from expanding fully and reduce holding capacity. Overhead installations do not need to be blown clean, as gravity will clear loose material.
Step 3: Insert the Anchor Through the Fixture
Place the sleeve anchor through the hole in the fixture (bracket, base plate, electrical box, etc.) and into the drilled hole. Drive the anchor into the hole by tapping the top with a hammer until the washer and nut (or head) are snug against the fixture surface. The sleeve must be fully seated in the hole before tightening.
Step 4: Tighten to Required Torque
Using a wrench or torque wrench, tighten the nut to the installation torque shown in the installation data table above. As the nut turns, the bolt draws upward and the expander cone forces the sleeve outward against the hole wall.
Allowable Load Data — Normal-Weight Concrete
The following table shows allowable tension and shear loads for Simpson Strong-Tie Sleeve-All anchors installed in normal-weight concrete. Values are shown for two concrete strengths: 2,000 psi and 4,000 psi. Loads are based on a safety factor of 4.0 and assume proper installation at the embedment depths shown. Refer to the edge distance and spacing section for load adjustment factors when anchors are installed near edges or close together.
| Size (in.) |
Embedment (in.) |
Tension Load (lbs) | Shear Load (lbs) | Install Torque (ft-lbs) |
||||
|---|---|---|---|---|---|---|---|---|
| f′c ≥ 2,000 psi | f′c ≥ 4,000 psi | f′c ≥ 2,000 psi | ||||||
| Ultimate | Allowable | Ultimate | Allowable | Ultimate | Allowable | |||
| 1/4 | 1-1/8 | 880 | 220 | 1,320 | 330 | 1,440 | 360 | 5 |
| 1-3/4 | 1,120 | 280 | 1,320 | 350 | 2,160 | 540 | ||
| 5/16 | 1-1/2 | 930 | 230 | 1,095 | 275 | 1,480 | 370 | 8 |
| 3/8 | 1-1/2 | 1,600 | 400 | 2,680 | 670 | 3,080 | 770 | 15 |
| 1/2 | 1-3/4 | 2,900 | 725 | 3,480 | 870 | 4,250 | 1,060 | 25 |
| 2-1/4 | 3,160 | 790 | 4,760 | 1,190 | 5,000 | 1,250 | ||
| 5/8 | 1-3/4 | 3,200 | 800 | 3,825 | 955 | 4,625 | 1,155 | 50 |
| 2-3/4 | 4,200 | 1,050 | 6,160 | 1,540 | 8,520 | 2,130 | ||
| 3/4 | 2 | 3,200 | 800 | 4,465 | 1,115 | 5,080 | 1,270 | 90 |
| 2-3/8 | 6,400 | 1,600 | 9,520 | 2,380 | 10,040 | 2,510 | ||
| 3-3/8 | 6,400 | 1,600 | 9,520 | 2,380 | 10,040 | 2,510 | ||
Source: Simpson Strong-Tie Sleeve-All catalog (C-A-2023). Allowable loads based on safety factor of 4.0. Refer to manufacturer data for complete embedment options and additional concrete strengths. Allowable loads may be increased for short-term loading due to wind or seismic forces. Minimum concrete thickness is 1-1/2 times the embedment depth.
The 1/2" diameter is one of the most popular sizes for general construction. At 1-3/4" embedment in 4,000 psi concrete, a 1/2" Sleeve-All provides an allowable tension load of 870 lbs and an allowable shear load of 1,060 lbs — adequate for most medium-duty applications such as handrails, equipment bases, and mechanical supports.
Sleeve Anchors in Masonry (CMU)
One of the biggest advantages of sleeve anchors over wedge anchors is their ability to work in concrete masonry units (CMU). The sleeve expansion distributes force along the full length of the anchor, which allows it to grip in hollow or partially grouted block. Load values in masonry are lower than in solid concrete, and they depend on whether the block is grout-filled and where in the block the anchor is placed.
Grout-Filled CMU
The highest masonry loads are achieved in fully grouted CMU. Simpson Strong-Tie publishes load data for anchors installed in single face shell, grout-filled CMU, and mortar “T” joints. As an example, a 1/2" Sleeve-All installed in a single face shell of grout-filled CMU provides an allowable tension load of 675 lbs and an allowable shear load of 1,135 lbs. In a mortar “T” joint, the same anchor provides 770 lbs allowable tension and 1,170 lbs allowable shear.
CMU Placement Guidelines
- Minimum embedment depth is measured from the outside face of the block unit
- For face shell installations, maintain at least 3" from vertical mortar joints and 1" from cell centerlines
- Values apply to 6" and 8" wide CMU with a minimum specified compressive strength of 1,500 psi at 28 days
- Allowable loads in masonry are based on a safety factor of 5.0 (more conservative than the 4.0 factor used for concrete)
For complete CMU load tables covering all diameters from 3/8" through 3/4", download the Simpson Sleeve-All Catalog (PDF).
Edge Distance & Anchor Spacing
When sleeve anchors are installed close to a concrete edge or close to other anchors, the allowable loads must be reduced using adjustment factors. Simpson Strong-Tie publishes two sets of factors: one for edge distance (fc) and one for spacing (fs).
Key Definitions
| Term | Definition |
|---|---|
| ccr (Critical Edge Distance) | Minimum edge distance for 100% of the published load. At this distance, no reduction is needed. |
| cmin (Minimum Edge Distance) | Absolute minimum edge distance. Below this, the anchor must not be installed. |
| scr (Critical Spacing) | Minimum center-to-center spacing for 100% of the published load. |
| smin (Minimum Spacing) | Absolute minimum center-to-center spacing. Below this, anchors must not be placed. |
Critical and Minimum Distances by Diameter
| Diameter | ccr (in.) | cmin (in.) | scr (in.) | smin (in.) |
|---|---|---|---|---|
| 1/4" | 2-1/2 | 1-1/4 | 4-1/2 | 2-1/4 |
| 5/16" | 3-1/8 | 1-9/16 | 5-3/4 | 2-7/8 |
| 3/8" | 3-3/4 | 1-7/8 | 6 | 3 |
| 1/2" | 5 | 2-1/2 | 9 | 4-1/2 |
| 5/8" | 6-1/4 | 3-1/8 | 11 | 5-1/2 |
| 3/4" | 7-1/2 | 3-3/4 | 13-1/2 | 6-3/4 |
When anchors are placed between the minimum and critical distances, multiply the published allowable load by the adjustment factor from the Simpson Sleeve-All edge distance or spacing tables. Reduction factors for multiple edges or spacings are multiplied together. For the complete adjustment factor tables, download the Simpson Sleeve-All Catalog (PDF).
Materials and Finishes
Simpson Strong-Tie Sleeve-All anchors are available in two material options:
| Material | Components | Best For |
|---|---|---|
| Zinc-Plated Carbon Steel | Anchor body: min. 50,000 psi tensile. Sleeve: SAE J403, Grade 1008 cold-rolled steel. Nut: ASTM A563 Grade A. Washer: SAE J403, Grade 1008/1010. | Interior use, dry environments, general construction. Most common and economical option. |
| Type 304 Stainless Steel | All components (body, sleeve, nut, washer) are Type 304 stainless steel. | Outdoor, wet, food processing, mild chemical exposure. Available in hex head 3/8" through 1/2" sizes. |
For outdoor or corrosive environments, stainless steel is strongly recommended. The zinc plating on carbon steel anchors provides moderate indoor corrosion protection but is not sufficient for prolonged outdoor or wet exposure. For more information on fastener material selection, see our Concrete Anchor Selection Guide.
Codes & Approvals
The Simpson Strong-Tie Sleeve-All carries the following code listings and approvals:
- Factory Mutual (FM): Approvals 3017082, 3026805, and 3029959 (carbon steel 3/8" through 1/2" diameter)
- Underwriters Laboratories (UL): File Ex3605 (3/8" through 3/4" diameter)
- Department of Transportation (DOT): Multiple state DOT listings
- Federal Specification: Meets the requirements of Federal Specification A-A-1922A
- ICC-ES: ESR-1222
When submitting anchor documentation for building code compliance or inspections, reference the ICC-ES evaluation report number. For FM or UL rated installations, verify that the specific anchor diameter and material match the approval listing.
Sleeve Anchor vs. Other Concrete Anchors
Sleeve anchors sit in the middle of the concrete anchor family — more versatile than wedge anchors, with moderate strength that covers a wide range of applications. Here is how they compare to the other main types:
| Feature | Sleeve Anchor | Wedge Anchor | Screw Anchor |
|---|---|---|---|
| Base Materials | Concrete, block, brick, stone | Solid concrete only | Concrete, block, brick |
| Holding Strength | Moderate | Highest | Moderate to high |
| Removable? | Partially (nut removable, sleeve stays) | No — permanent | Yes — fully removable |
| Head Style Options | Hex, acorn, flat head, rod coupler | Hex only | Hex, flat head |
| Common Sizes | 1/4" to 3/4" | 1/4" to 1" | 3/16" to 3/4" |
| Best For | Handrails, electrical, signage, masonry, medium-duty structural | Heavy structural, sill plates, equipment, seismic | Temporary connections, close-to-edge, ledger boards |
For a detailed comparison of all three anchor types including selection guidance, see our Concrete Anchor Selection Guide. For wedge anchor specifics, see the Wedge Anchor Selection & Installation Guide.
Frequently Asked Questions
Can sleeve anchors be used in brick or block?
Yes. Sleeve anchors are one of the few mechanical expansion anchors approved for use in brick and concrete block (CMU). The sleeve expansion distributes the load along the full anchor length, which works in both solid and hollow substrates. However, load values in masonry are lower than in solid concrete — always check the manufacturer’s masonry load tables for your specific application.
What is the difference between a sleeve anchor and a wedge anchor?
Both are expansion anchors, but they use different mechanisms. A wedge anchor has a solid bolt body with a small clip that expands at the very bottom of the hole — this gives the highest load capacity but requires solid concrete. A sleeve anchor has a thin metal sleeve that expands along its full length, which provides moderate load capacity but works in concrete, block, brick, and stone. If you are working in solid concrete and need maximum strength, use a wedge anchor. If you need material versatility, use a sleeve anchor.
Can I remove and reuse a sleeve anchor?
You can remove the nut, washer, and bolt to release the fixture, but the expansion sleeve stays embedded in the base material. The bolt can sometimes be reinserted through a new fixture, but the anchor cannot be fully extracted. For a fully removable concrete fastener, use a screw anchor (Tapcon-style).
What drill bit do I need for a sleeve anchor?
The drill bit diameter matches the nominal anchor diameter. A 3/8" sleeve anchor requires a 3/8" carbide-tipped concrete drill bit. Use an SDS-plus rotary hammer drill for best results. See the installation data table above for all diameters.
Are sleeve anchors code-approved?
The Simpson Strong-Tie Sleeve-All carries ICC-ES evaluation report ESR-1222, as well as FM, UL, and DOT listings. When a building inspector asks for anchor documentation, the ICC-ES ESR number is what they are looking for. See the codes and approvals section above for specific listing numbers.
What head style should I use?
For most applications, use hex head — it is the most common and provides the widest size selection. Use acorn head for finished or exposed applications. Use flat head when the anchor must sit flush with the surface. Use rod coupler for hanging threaded rod in overhead or suspension applications. See the head style section above for details.
How much weight can a sleeve anchor hold?
Load capacity depends on the anchor diameter, embedment depth, concrete strength, and base material. As an example, a 1/2" Sleeve-All at standard embedment in 4,000 psi concrete has an allowable tension load of approximately 529 lbs and an allowable shear load of approximately 1,060 lbs (safety factor of 4.0). See the load tables for complete data by diameter and embedment.
Download the complete Simpson Sleeve-All product catalog for full load tables, CMU data, edge distance adjustment factors, and product ordering information.
Download Sleeve-All Catalog (PDF) →
Need Sleeve Anchors for Your Project?
Eugene Fastener stocks Simpson Strong-Tie Sleeve-All anchors from 1/4" through 3/4" in zinc plated and stainless steel finishes. Hex head, acorn head, flat head, and rod coupler configurations available. Volume pricing for project quantities.
Include: diameter, length, head style, finish, quantity, ship-to ZIP, and need-by date for fastest quoting.
Related Resources
- Wedge Anchor vs Sleeve Anchor Comparison — side-by-side: substrate, load, install, code listing
- Concrete Anchor Selection Guide — choosing between wedge, sleeve, and screw anchors
- Wedge Anchor Selection & Installation Guide — step-by-step installation with torque tables
- Concrete Anchor Drill Bit & Hole Size Chart — drill bit sizes for all anchor types
- Simpson Sleeve-All Catalog (PDF) — complete product data, load tables, and ordering information
- Shop Sleeve Anchors
- Shop All Concrete Anchors
- Technical Resource Center — all guides and reference articles