Type 302/303 Self - Tapping Thread Insert With Cutting Slot
Introduction
Self-tapping threaded sleeves are also called self-tapping threaded
sleeves. They are a new type of fastener that enhances the thread
strength. Self-tapping threaded sleeves have tooth patterns on the
inside and outside. They are embedded in softer materials such as
plastic, aluminum alloy cast iron, and copper to form a relatively
High-strength internal threaded holes, self-tapping screw sleeves
(self-tapping braces) can also repair damaged internal threads.
302 type is the most widely used in all self tapping screw sleeve
products. Its two slots not only play the role of cutting, but also
have a little inward locking force.
Model 303 is a thin-walled version of 302 series, which is mainly
used in some plastic or light alloy that cannot have thick wall.
Parameter
| Finish | Natural colour,Green,Red,Blue |
| Application | Light alloy, heavy industry, medical treatment, foundry industry,
others |
| Brand Name | AVIC-Flight |
| Standard | KKV |
| Material | Stainless steel, Carbon steel |
| Name | Self tapping Inserts |
| Model | 302/303, 307/308 |
| Options |
| Model | 302 | 303 | 307 | 308 |
| Material | Stainless steel | Carbon steel |
| Standard | KKV |
| Model | Metric | M3 | M4 | M5 | M6 | M8 | M10 | M12 | M16 |
| British | 6-32 | 8-32 | 10-32 | 1/4-20 | 1/2-13 | 5/8-11 |
| Accuracy | Green | Red | Golden | Blue | Non | Customized |
For difficult to cut materials, it has larger wall thickness,
shallower but sharper external thread. The screw sleeve uses three
round holes as cutting edge. The difference between 307 and 308 is
the length of the insert.
Installation method
Self-tapping screw sleeve installation method
1: When the number of installations is small, a simple installation
method can be adopted. Specifically, the method of corresponding
specification bolt + nut is adopted, and the self-tapping screw
sleeve is fixed on the bolt of the corresponding model, and the nut
of the same model is used Fix it to make the three into a whole,
then use a wrench to screw the screw sleeve into the bottom hole,
and then pull out the bolt.
2: When the number of installations is large, special self-tapping
screw sleeve installation tools can be used, first install the
self-tapping screw sleeve on the special tool, and screw the
installed screw sleeve into the pre-made hole about a circle ,
After ensuring that the tool is perpendicular to the end face of
the prefabricated hole, screw in the screw sleeve forcefully. When
the end face of the self-tapping screw sleeve is about 0.2mm lower
than the end face of the prefabricated hole, stop screwing in and
screw out the special tool in the reverse direction. The end of the
self-tapping screw sleeve installation tool is a hexagon head,
which can be connected with a manual tapping wrench, or an electric
or pneumatic tool.
Application
It is widely used in aerospace components, locomotive, high-voltage
electrical appliances, automotive power, wind power, nuclear power,
communication and electrical industries. It is used in aluminum,
magnesium, copper alloy, plastic, plexiglass, plywood, steel, cast
steel and cast iron to make it more tough and firm.
Why Choose Us?
1. A factory with more than 20 years' experience in manufacturing
of Thread Inserts.
2. Competitive pricing & military quality.
3. Quick replies to quotations and requests for information.
4. Timely deliveries, rich experience in IMP and EXP.
5. Advanced R & D center, more than one thousand types of threaded
inserts and tools.
6. Strict quality control system, passed the SGS and ISO9001: 2015.
7. Quality tools & products, as good as heli-coil, Keensert, Ensat
and etc.
8. Comprehensive after-sales support and troubleshooting.
9. Famous brands in China .
10. High quality enterprises in the region.
