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Self-tapping threaded inserts
Self-Tapping Insert
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Self-tapping threaded inserts

Self-tapping threaded inserts
Three-holes self-tapping threaded inserts

Three-holes self-tapping threaded inserts
Cutting slot self-tapping threaded inserts

Cutting slot self-tapping threaded inserts
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Free running and self-locking Tangless ...
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Slotted 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
0102030405
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Cutting slot self-tapping threaded inserts (1).png
Self-tapping threaded inserts (3).png

Self-tapping threaded inserts

Self-Tapping Insert is a one-piece, internally-threaded bushing whose external surface is formed as a hardened cutting or rolling thread. It is designed to create or restore strong, reusable threads directly in soft or non-ferrous parent materials—such as aluminum, magnesium, plastics, wood composites, or even thin-gauge steel—without the need for a separate tapping operation. After installation, the insert becomes a permanent metal thread that accepts standard bolts or screws, enabling unlimited disassembly and re-assembly without loss of holding power.

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    Product Materials
    Product Dimensions
    Product Advantages
    Product Applications
    Installation Procedure
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    303 Stainless Steel

    excellent corrosion resistance and machinability for general-purpose use.

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    316/316L Stainless Steel

    superior pitting and chloride resistance for marine, chemical, and food-processing environments.

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    4140 Alloy Steel, Zinc-Nickel Plated

    high tensile strength and cost-effective for automotive and tooling applications.

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    Brass C36000

    non-sparking and non-magnetic, ideal for electrical housings and precision instruments.

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    All materials are heat-treated to 40–48 HRC on the external cutting zone, while the internal threads remain at 28–32 HRC to prevent galling.

    Three-holes self-tapping threaded inserts (3)

    Thread Range: Metric M2 × 0.4 up to M24 × 2.5; Imperial #2-56 UNC through ¾-10 UNC.

    Body Styles:
    – Cutting slotted (302 style) for through holes and rapid machining.
    – Cutting bores (307/308 style) for blind holes and maximum torque resistance.
    – Thin-wall variants for restricted wall thickness.
    Head Options: flush, countersunk 90°, and miniature flange heads for flush or protruding requirements.

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    Advantages

    ◎ No Pre-Tapping: External cutting or rolling threads eliminate the need for a separate tap, cutting installation time by 50–70 %.

    ◎ Strong Load Path: Cold-worked parent material and large thread engagement deliver 1.5–2× the pull-out strength of the original tapped hole.

    ◎ Vibration & Fatigue Resistance: Undercut or serrated edges lock axially and radially, meeting MIL-STD-1312-8 vibration specifications.

    ◎ Re-Usability: Threads are hardened but smooth, allowing >50 removal/insert cycles with <5 % torque decay.

    ◎ Temperature & Chemical Tolerance: Stainless variants operate from –240 °C to +450 °C, pass 1 000 h salt-spray per ASTM B117.

    ◎ Cost & Weight Savings: Enables thinner wall sections and lighter alloys without sacrificing joint integrity.

    Soft Metals1
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    Automotive

    aluminum engine blocks, transmission housings, electric-vehicle battery trays.
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    Aerospace

    composite access panels, UAV magnesium chassis, satellite electronic enclosures.
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    Electronics

    plastic laptop shells, 5G heat-sink plates, PCB standoffs.
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    Industrial Equipment

     robotic arms, injection-mold dies, packaging machinery frames.
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    Renewable Energy

    wind-turbine nacelle covers, solar-panel aluminum rails.
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    Sports & Recreation

    carbon-fiber bicycle components, drone frames, climbing equipment.

    ◎ Drill the pilot hole to the recommended diameter and depth.

    ◎ (Optional) Countersink 90° to ensure flush seating.

    ◎ Using an electric or manual driver set to low RPM, thread the Self-Tapping Insert into the hole until the top is flush with the surface. For plastic or thin metal, a light press-in operation may be used.

    ◎ Inspect visually; a correctly installed insert will show uniform chips (slotted style) or clean rolled threads (tri-lobe style) and sit flush without protrusion.

    ◎ Allow any induced stresses to relax (5–10 min for plastics), then torque-test the mating bolt to specification.

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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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