Screw Thread function:
Fastening and connection function: suitable for most screw products at this stage.
Transmission effect (displacement effect): such as the micrometer used by QC to check the size.
Sealing function: such as the connection sealing of pipes.
The development history of the thread:Machine thread: When assembling, first drill and tap on the assembly, and the internal thread of the tapping is the same as the external thread of the screw, and is assembled with a small torque.
Self-tapping thread: When assembling, drill holes on the assembly first, without tapping the inner teeth, use a large torque to assemble.
Self-drilling thread: used directly on the assembly, the screw is drilled and tapped at one time.
