Talking about thread restriction

(1) Common thread: The tooth profile is triangular, which is used to connect or fasten parts. Ordinary threads are divided into coarse threads and fine threads according to pitch, and the connection strength of fine threads is higher.

(2) Transmission thread: the tooth profile includes trapezoid, rectangle, sawtooth and triangle.

(3) Sealing thread: used for sealing connection, mainly including pipe thread, taper thread and taper pipe thread.