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

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 |
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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.

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.

302 series Self tapping thread insert parameter
Metric Thread |
Inch thread |
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Internal thread |
External thread |
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Length |
Internal thread |
External thread |
Length |
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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 |
|
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M18 |
22 |
1.5 |
24 |
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M20 |
26 |
1.5 |
27 |
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M22 |
26 |
1.5 |
30 |
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M24 |
30 |
1.5 |
30 |
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M27 |
34 |
1.5 |
40 |
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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