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Cutting slot self-tapping threaded inserts
Self-Tapping Insert
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Cutting slot self-tapping threaded inserts

Cutting slot self-tapping threaded inserts (also known as 302 self-tapping inserts) are self-tapping threaded inserts widely used in soft materials such as plastics, aluminum alloys, and cast iron to strengthen threads or repair damaged threads. Below is a detailed product description:

Product Definition
Cutting slot self-tapping threaded inserts are one-piece threaded inserts with cutting grooves. They feature both internal and external threads, and a groove at the rear creates a cutting edge. No pre-tapped threads are required during installation; they can be screwed directly into a pre-drilled hole, creating a high-strength internal thread in the parent material through self-drilling.

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    Materials and Surface Treatment 
    Dimensions
    Product Advantages
    Product Applications
     Installation Method

    Common materials include:

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    Carbon steel

    Surface-plated with zinc or chrome plating, suitable for low-strength materials such as aluminum alloys, copper alloys, and plastics;

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    Stainless steel 303/304/316

    Highly corrosion-resistant, suitable for high-stress or corrosive environments, such as marine applications and electronic equipment. 

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    Cutting slot self-tapping threaded inserts (3)

    ◎ Metric thread sizes include M3, M4, M5, M6, M8, M10, M12 and so on.

    ◎ Inch/Unified threads (UNF/UNC) include #4-40, #6-32, #8-32, #1/4-20 and so on.

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    Advantages

    ◎ Strong self-tapping capability: No pre-tapping required, saving steps and costs.

    ◎ Thread repair capability: Repairs stripped or damaged internal threads.

    ◎ Vibration and anti-loosening: Tightly bonds to the parent material, providing excellent anti-loosening properties.

    ◎ High pull-out force: Large contact area and strong load-bearing capacity.

    ◎ Easy installation: Requires only pre-drilling and installation tools, no taps or other complex tools required.

    Widely used in the following industries and products:

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    Automotive

    Engines, transmissions, headlights, bumpers, etc.;
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    Electronic and electrical appliances

    Appliance housings, communications equipment, solar lamps;
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    Mechanical equipment

    Construction machinery, power tools, molds;
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    Aerospace and military

    Lightweight structural component connections;
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    Furniture and consumer goods

    Engineering plastics, high-end modular furniture, etc.

    Pre-drilling: Select an appropriate drill bit based on the insert's outer diameter and material.

    Screwing into the insert: Use a dedicated tool to screw the slotted self-tapping insert into the hole, and the cutting groove automatically creates the thread.

    Checking the depth: Ensure the insert is slightly below or flush with the workpiece surface after installation.

    Screwing: Standard bolts can be used for immediate assembly without waiting for curing.

    For specific application requirements (such as plastics, high-strength metals, or corrosion resistance), ST self-tapping inserts with three round holes (307/308) or flanged versions are also available as alternatives.

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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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