M8 Dia 8mm Length 13.8mm Thread Plastics Insert Heat Melting Brass Inserts
Description
In general, the screw connection between plastic parts is usually connected by self-tapping screws. The inner hole of the plastic screw column can be formed by injection molding at one time, and the subsequent self-cutting of the self-tapping screw is used to generate the threaded connection, which is convenient and fast; however; When the connection strength between plastic parts needs to be improved, the screw must be tightened with sufficient torque to generate sufficient axial tension between the main part and the screw thread to prevent loosening. However, the inner hole of the plastic screw column If the thread cannot withstand a large enough load, slippage or looseness will occur, which naturally cannot meet the required connection strength.
Specification
Type
| Thread | Length L | Head thickness T | Head diameter ФD1 | Outer diameter ФE | Guide column ФC |
BP BPH | M2 | 3.1 | 0.5 | 4.8 | 3.5 | 3.1 |
4.2 | ||||||
M2.5 | 4.1 | 0.75 | 5.5 | 4.5 | 3.9 | |
5.2 | ||||||
M3 | 4.1 | 0.75 | 5.5 | 4.5 | 3.9 | |
5.2 | ||||||
M3.5 | 4.1 | 0.75 | 6.4 | 5.5 | 4.6 | |
7.0 | ||||||
M4 | 5.6 | 0.75 | 7.1 | 6.3 | 5.5 | |
8.5 | ||||||
M5 | 6.6 | 0.9 | 7.9 | 7.0 | 6.3 | |
10.1 | ||||||
M6 | 7.7 | 1.0 | 9.5 | 8.5 | 7.9 | |
12.3 | ||||||
M8 | 8.3 | 1.03 | 12.7 | 10.5 | 9.5 | |
13.8 | ||||||
M10 | 10.5 | 1.25 | 14.3 | 13.0 | 11.8 |
Effect
1. Improve the connection strength between plastic parts.
The metal thread can prevent the thread from deforming under the entire load, so the copper nut can significantly improve the connection strength in the plastic part.
2. The plastic parts need to be disassembled many times.
Some products require maintenance or require frequent disassembly and assembly of certain parts. The use of copper nuts embedded in the plastic parts can achieve repeated disassembly and assembly without losing the integrity of the thread. This is also self-tapping. The screw column is incomparable.
3. Replace metal parts with plastic parts.
Although metal parts are easy to obtain high-strength threaded connections, their processing and material costs are high, and their specificity is high. They are not suitable for cost-required and lightweight products. Therefore, copper nuts can be embedded in the plastic parts. Meet this demand.
Option
1. The crystalline plastic is relatively insensitive to stress, so all kinds of nuts can be applied
2. Amorphous plastic is very sensitive to stress. When choosing the nut type, avoid sharp knurling. Special care should be taken for those plastic parts that need to be electroplated for the screen. Pickling of the plastic parts with embedded nuts will cause serious cracking. It is best to first electroplating and embed the nuts.
3. Thermosetting plastics are not suitable for hot-melt and ultrasonic implantation of nuts. If necessary, you can choose precise and sharp knurled nuts to press in.