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Type 302 Slotted Self-Tapping Thread Inserts - Stainless Steel & Zinc-Plated Carbon Steel

Self tapping thread insert

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Type 302 Slotted Self-Tapping Thread Inserts - Stainless Steel & Zinc-Plated Carbon Steel

The 302 series is the most widely used of all self-tapping thread inserts, with two slots that not only cut, but also provide a slight inward locking force.

The 303 series is a thinner walled version of the 302 series and is mainly used in plastics or light alloys where thick walls are not possible, and where lubrication may be considered for installation in special cases.

 

    Core Features

    11

    Dual Material Excellence:
    Stainless Steel 304/316: ASTM F738 compliant, salt spray resistance >1000h
    Carbon Steel 10B21: Zinc plating (Blue/White/Yellow) per ISO 4042, 8-12μm coating
    Optimized Design:
    4-slot geometry for chip evacuation (Patent Pending)
    30° lead-in chamfer for easy insertion
    Class 6H internal thread precision
    Sizes: M3-M12 | #6-32 to 1/2"-13 UN

    Technical Specifications Table

    Technical Specifications Table

    Parameter

     

    Stainless Steel Version

    Zinc-Plated Carbon Steel

    Wire Diameter

    0.8-2.0mm (±0.02mm)

    1.0-2.5mm (±0.03mm)

    Installation Torque

    0.6-8 N·m (size dependent)

    0.8-10 N·m (size dependent)

    Stripping Torque

    120% of base material

    150% of base material

    Temperature Range

    -200°C to +650°C

    -30°C to +120°C

    Standards

    ISO 15480,DIN 7976,ASME B18.29.1

    Product Installation Steps

    Manual Installation:

    Use the special thread insert installation tool. Refer to the figure below for the specific operation method. The end of the tool in the figure is a quadrangle head which can be connected with a manual tapping wrench.

    5

    Electric Installation

    1. Position the workpiece exactly,so that drilling and machines -spindle axially parallel to each other lie (do not tilt).Machine to the exact screwing depth adjust (approx. 0.1 to 0.2 mm under the workpiece surface ).

    2. Machine operating lever actuate. When you start screwing in, the rota table outer sleeve of the tool must be in line with what is visible on the outside stop pins so that they of these clockwise with -is taken.

    3. Add Self tapping thread insert to the tool (Slot or cutting hole according to bottom) and 2 to 4 turns hold on for a long time.

    4. Machine operating lever continue to operate and take the tool with you Guide Self tapping thread  insert to the hole until the Self tapping thread  insert gets into the borehole cuts in. The further turning takes place without feed actuation.

    5. Switch on reverse (depending on type and the device is constructed

    this automatically using a limit switch or depth finder). Hard landing

    of the tool onto the workpiece avoid at all costs; otherwise exists

    Risk of breakage for tools and Self tapping thread insert. In addition, The play-free tight fit of the Self tapping thread insert is destroyed and the pull-out strength is reduced. The screwing speed may need to be adjusted to the required speed Switchover time can be adjusted.

    Electric Installation

    302 series Self tapping thread insert parameter

    Metric Thread

    Inch thread

    Internal thread

    External thread

     

    Length

    Internal thread

    External thread

    Length

    A

    E

    P

    B

    A

    E

    P

    B

    M2

    4.5

    0.5

    6

    UNC

    UNF

     

     

     

    M2.5

    4.5

    0.5

    6

    4-40

    4-48

    5

    0.5

    6

    M3

    5

    0.5

    6

    6-32

    6-40

    6

    0.75

    8

    M3.5

    6

    0.75

    8

    8-32

    8-36

    6.5

    0.75

    8

    M4

    6.5

    0.75

    8

    10-24

    10-32

    8

    1

    10

    M5

    8

    1

    10

    1/4-20

    1/4-28

    10

    1.5

    14

    M6(a)

    9

    1

    12

    5/16-18

    5/16-24

    12

    1.5

    15

    M6

    10

    1.5

    14

    3/8-16

    3/8-24

    14

    1.5

    18

    M8

    12

    1.5

    15

    7/16-14

    7/16-20

    16

    1.5

    22

    M10

    14

    1.5

    18

    1/2-13

    1/2-20

    18

    1.5

    22

    M12

    16

    1.5

    22

    5/8-11

    5/8-18

    20

    1.5

    22

    M14

    18

    1.5

    24

    4-40

    4-48

    5

    0.5

    6

    M16

    20

    1.5

    22

     

    M18

    22

    1.5

    24

    M20

    26

    1.5

    27

    M22

    26

    1.5

    30

    M24

    30

    1.5

    30

    M27

    34

    1.5

    40

    M30

    36

    1.5

    40

    FAQ

     Q: How to remove damaged inserts?
    A: Use reverse-thread extractor (provided free with 500+ orders)
    Q: Can inserts be used in cast iron?
    A: Recommended for soft materials (Al/Plastic/Wood). Use KEENSERTS for cast iron
    Q: Do you provide RoHS compliance certificates?
    A: Yes! SS 304/316 and Zn coatings meet EU 2011/65/EU

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