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Simpson Flat Sleeve Anchors

  • Wednesday, April 30, 2008

    Purchase Sleeve Anchors

    Flat-headed Sleeve-All® sleeve anchors are manufactured by Simpson Strong-Tie and are sleeve anchors with a flat phillips countersunk head. Flathead Sleeve-All® sleeve anchors are used in applications where the head of the fastener needs to be countersunk and flush with the surface of the material being fastened. Examples of this type of application are metal door frames to a concrete or block wall, or metal thresholds to concrete.

    Flat Sleeve-All® - Finish and Material

    The flat Sleeve-All® sleeve anchor is available in standard zinc plated carbon steel and a type 304 stainless steel. The body of the anchor meets minimum tensile strengths of 50,000 psi and the nut, washer and sleeve are made from the SAE J403 or ASTM A563 types of steel.

    Flat Sleeve-All® - Federal Specifications

    Meets or exceeds federal specification requirements A-A-1992A

    Flat Sleeve-All® - Available Diameters

    The flat Sleeve-All® sleeve anchors are available in 3 diameters of 1/4”, 5/16” and 3/8”. The flat headed Sleeve-All® sleeve anchors have a phillips drive #2 for the 1/4” and 5/16” and # 3 for the 3/8”.

    Flat Sleeve-All® - Available Lengths

    The 1/4” and 5/16” flat headed Sleeve-All® sleeve anchors are manufactured in two lengths and the 3/8” flat head sleeve anchor is available in four lengths. The length of the flat-headed sleeve anchor to be used in any particular application is determined by adding the thickness of the material being fastened to the minimum embedment for the diameter of flat sleeve anchor being used. The length of the flat Sleeve-All® sleeve anchor is measured as an overall length of the anchor, including the head.

    Flat Sleeve-All® - Minimum Embedment

    The minimum embedment for each of the flat head Sleeve-All® sleeve anchor is determined by the diameter of the flat headed Sleeve-All® sleeve anchor being used for any particular application. Larger diameter sizes require deeper embedment into the base material for the anchor to achieve minimum holding values. See Chart B below for the maximum thickness of a fixture for each diameter and length of flat headed Sleeve-All® sleeve anchor.

    Flat Sleeve-All® - Diameter of Hole

    The hole diameter to be drilled into the base material is the same diameter as the flat Sleeve-All® sleeve anchor being installed. The 1/4” flat Sleeve-All® sleeve anchor needs a 1/4” hole, the 5/16” anchor needs a 5/16” hole and the 3/8” anchor needs a 3/8” hole. The hole size is critical for all expansion type anchors because an oversized hole will make it difficult for the anchor to expand properly and the holding values will be compromised.
    Hole size is equal to the diameter of the acorn Sleeve-All® sleeve anchor. To ensure that the hole is the proper size it is very important to use a carbide bit that meets ANSI standards and that the hole is drilled using a hammer type drill.

    Flat Sleeve-All® - Length of Hole

    The depth of the hole in the base material should be 1/4” to 1/2” deeper in the base material than the flat Sleeve-All® sleeve anchor will penetrate. This extra space is needed to hold the dust or debris that is created during the installation process that might prevent the proper expansion of the flat Sleeve-All® sleeve anchor.

    Flat Sleeve-All® - Diameter of Hole in Fixture

    Concrete expansion anchors designated diameters are larger than the true diameter, for example, a 3/8” diameter flat Sleeve-All® sleeve anchor is larger than 3/8”. It is critical that the hole in the fixture is large enough for the flat Sleeve-All® sleeve anchor being used to fit through. The hole in the fixture needs to be about 1/8” larger in diameter than the flat Sleeve-All® sleeve anchor being used to ensure enough clearance.

    Flat Sleeve-All® - Installing

    1. Using a hammer drill and a 1/4” ANSI standard carbide bit, drill a hole in the base material deep enough so that the hole will be a minimum of 1/4” deeper than the flat Sleeve-All® sleeve anchor will go into the base material.

    2. Compressed air or a blowout bulb should be used to clean out the hole.

    3. Unscrew the flat head of the sleeve anchor so that it allows just a couple of threads to be threaded.

    4. Insert the flat Sleeve-All® sleeve anchor through the hole in the fixture and into the hole drilled in the base material until the head of the flat Sleeve-All® sleeve anchor is flush with the surface of the fixture.

    5. Use a slotted or phillips screwdriver to turn the head clockwise until snug.

    Flat Sleeve-All® - Installation Information (Chart A)                

    Flat Sleeve-All® Diameter




    Carbide Bit Diameter




    Size of Screw Driver




    Flat Sleeve-All® - Product Information (Chart B)


    Part Number

    Diameter Bolt Threads

    Maximum Fixture Thickness

    Box Quantity

    1/4” x 2”


    3/16” – 24



    1/4” x 3”


    3/16” – 24



    5/16” x 2-1/2”


    1/4” - 20



    5/16” x 3-1/2”


    1/4” - 20



    3/8” x 2-3/4”


    5/16” – 18



    3/8” x 4 ”


    5/16” – 18



    3/8” x 5”


    5/16” – 18



    3/8” x 6”


    5/16” – 18



    Stainless Steel Flat Sleeve-All®

    The acorn Sleeve-All® does not come in any type of stainless steel that is offered by Simpson Strong-Tie. Concrete Fasteners, Inc. does have a complete line of stainless steel sleeve anchor, including the acorn headed sleeve anchor. Check out our sleeve anchor prices now!

    Purchase Sleeve Anchors


    Always use personal protective equipmentAs with any anchoring project, it is important to keep safety in mind and follow instructions carefully. Always remember to wear safety goggles, handle all tools with extra care and follow all technical specifications. This article is meant to serve only as a basic explanation of concrete fasteners. Always refer to manufacturer's instructions or consult a contracting expert during any anchoring project.

    Article Written By:
    Mike Pistorino, Vice-President Operations





    Concrete Fasteners, Inc. has over 40 years of experience selling concrete fasteners. We can ship out one box or a whole pallet of concrete anchors. Our products are of the highest quality... "your satisfaction is guaranteed". We ship all orders the same day the order is received.

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