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Key locking threaded Insert
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Self- locking Key locking threaded Insert

Self- locking Key locking threaded Insert
Key locking threaded Insert

Key locking threaded Insert
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Key locking threaded Insert

A Key Locking Insert is a high-strength, cylindrical threaded bushing engineered to create permanent, reusable, and vibration-resistant threads in soft or previously damaged parent materials. After insertion into a tapped hole, two to four hardened keys are driven into the surrounding substrate, locking the insert against both rotation and axial movement. This mechanical anchoring system delivers superior pull-out and torque-out performance compared to conventional threaded inserts or tapped threads alone.

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    Product Materials
    Product Dimensions
    Product Advantages
    Product Applications
    Product Installation
    All keys are manufactured from the same alloy as the body and heat-treated to ≥ 40 HRC to ensure reliable cold-swaging into the parent material.
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    Standard Body

    303 stainless steel for excellent machinability and corrosion resistance.
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    High-Corrosion Option

    316/316L stainless steel for marine, chemical, and food-grade environments.
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    High-Temperature Variant

    Inconel 718 or A286 for service up to 815 °C (1 500 °F).
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    Carbon-Steel Version

    4140 alloy steel, zinc-nickel plated for cost-sensitive automotive and tooling applications.
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    Key locking threaded Insert

    Standard Ranges

    ◎ Metric: M2 × 0.4 through M24 × 3.0, lengths from 1.5 d to 3.0 d (where d = nominal thread diameter).

    ◎ Inch: #2-56 UNC through 1¼-12 UNF, lengths from 0.250 in to 2.000 in.

    ◎ Wall styles: thin-wall (for limited space), heavy-duty (for maximum load), and extra-heavy (for oversized holes).

    ◎ Head styles: standard flush, countersunk (90° or 120°), and floating (for alignment tolerance).

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    Advantages

    ◎ Load Transfer: Provides 1.5–2× the pull-out strength of the parent tapped hole.

    ◎ Vibration & Shock Resistance: Positive key lock prevents loosening under dynamic loads.

    ◎ Thread Repair: Eliminates the need to drill and re-tap to a larger size.

    ◎ Re-usability: Can be removed and replaced without damaging the parent thread.

    ◎ Wide Temperature & Chemical Tolerance: Operates from cryogenic ‑240 °C to 815 °C with appropriate alloy choice.

    ◎ Compliance: Meets or exceeds MIL-I-45914, NASM8846, MS51835, and ISO 10964 specifications.

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    Aerospace

    wing spars, landing-gear trunnions, avionics racks.

    Construction industry
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    Defense

    armored-vehicle hulls, artillery mounts, missile guidance frames.

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    Automotive

    aluminum engine blocks, transmission housings, EV battery trays.

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    Industrial

    robotic arms, injection-mold dies, wind-turbine gearboxes.

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    Energy

    offshore riser flanges, nuclear containment hardware, petrochemical manifolds.

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    Electronics

    magnesium laptop housings, 5G heat-sink plates.

    ◎ Drill the hole to the specified insert outside diameter.
    ◎ Tap with the corresponding STI (Screw-Thread Insert) tap.
    ◎ Screw the insert in until flush or slightly below the surface.
    ◎ Using the provided key-driver tool, drive each key into the pre-drilled recesses until flush with the insert head.
    ◎ Inspect for flush seating and perform torque test if required.
    ◎ No additional locking compounds or special fixtures are necessary, making field repair quick and reliable.

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    Welcome to discuss more details and usage of the product with us at any time. We look forward to your contact!

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