STS Industrial - Bolts & Screws




The Crimp anchor is an easy-to-install expansion anchor for use in concrete and grout-filled block. The pre-formed curvature along the shaft creates an expansion mechanism that secures the anchor in place and eliminates the need for a secondary tightening procedure. This speeds up anchor installation and reduces the overall cost.

Four Crimp anchor head styles are available to handle different applications that include fastening wood or light-gauge steel, attaching concrete formwork, hanging overhead support for sprinkler pipes or suspended ceiling panels.

Warning: Industry studies show that hardened fasteners can experience performance problems in wet or corrosive environments. Accordingly, with the exception of the duplex anchor, use these products in dry, interior and non-corrosive environments only.

Crimp Anchors


    Crimp Anchor Product Data

    1. Mechanical galvanizing meets ASTM B695, Class 55, Type 1. Intended for some pressure treated wood sill plate applications. Not for use in other corrosive or outdoor environments.

    Length Identification Head Marks on Mushroom and Duplex Crimp Anchors

    (corresponds to length of anchor – inches).

    Length Identification Head Marks on Mushroom And Duplex Head Crimp

    Tension and Shear Loads in Normal Weight Concrete

    Tension and Shear Loads for Crimp Anchors in Normal-Weight Concrete

    Tension and Shear Loads in Sand-Lightweight Concrete Over Metal Deck

    Tension and Shear Loads for Crimp Anchors in Normal-Weight Concrete

    Sand-Lightweight Concrete Over Metal Deck

    Sand-Lightweight Concrete


    • Drill a hole using the specified diameter carbide bit into the base material to a depth of at least 1/2″ deeper than the required embedment.
    • Blow the hole clean of dust and debris using compressed air. Overhead application need not to be blown clean. Where a fixture is used, drive the anchor through the fixture into the hole until the head sits flush against the fixture.
    • Be sure the anchor is driven to the required embedment depth. The Rod Coupler and Tie-Wire models should be driven in until the head is seated against the surface of the base material.

    Mushroom Head

    Mushroom Head Installation Sequence

    Rod Coupler

    Rod Coupler Crimp Anchor Installation Sequence

    Tie Wire

    Easy Set Install

    Duplex Head

    May be removed with a claw hammer.

    Duplex Head Crimp Anchor Removal

    • ICC-ES ESR-1396
    • City of L.A. RR24682
    • Factory Mutual 3017082, 3031136 and 3043442
    • Florida FL15730.8
    • Underwriter Laboratories File Ex3605
    • Meets Federal Specifications A-A-1923A, Type 4

    The Tie-Wire anchor is not code listed. The load tables list values based upon results from the most recent testing and may not reflect those in current code reports. Where code jurisdictions apply, consult the current reports for applicable load values.


    The Wedge-All anchor has been tested in accordance with ICC-ES’s Acceptance Criteria for Expansion Anchors (AC01) for the following:

    • Static tension and shear loading
    • Seismic and wind loading
    • Combination tension and shear loading
    • Critical and minimum edge distance

Sources: ASTM Standards for Mechanical Fasteners and Related Processes 2nd Edition, Inch Fastener Standards 8th Edition, Simpson Strong-Tie Anchoring and Fastening Systems for Concrete and Masonry,

Note: All material included on this page is informational only, and should not be used as one’s sole source for design purposes. STS Industrial, Inc. and its affiliates do not guarantee the accuracy of the information on this site, and retain no liability for the use or misuse of the information contained on this site.