| Self-Tapping Screws |
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| Self-tapping screws are often used to fasten plastic parts together. Self-tapping screws are available both in thread-cutting type as well as thread-forming type. |
| Thread Forming | |
| Pros | Cons |
| High tensile values | High hoop stress, boss has to be designed to withstand this stress |
| High amount of torque to strip threads | |
| Large number of cycles of assembly and disassembly possible | Stress relaxation possible |
| Suitable for plastics that are non-brittle | Not suitable for brittle plastics |
| Thread Cutting | |
| Pros | Cons |
| Lower Hoop Stress | Lower Tensile Pullout |
| Suitable for brittle plastics | Lower amount of torque to pull the threads |
