What is thread protector

After the processing of some mass-produced products, due to the fact that they have to be stored, packed and transported before they reach the user's hands, there is no collision and sand erosion in the middle of the process, and the processed external thread [generally pipe type], the internal thread is easy to be damaged, especially the internal thread is polluted by sand [such as hydraulic pump]. Therefore, people use plastic as a sealed pipe head to cover the external thread, Make a plastic part to screw the internal thread to protect the thread from damage and to protect the internal from sand and dust This plastic part is called thread protector. The structure of thread protector can be divided into full plastic type, steel plastic type and all steel type

1. Thread taper:

(1) The taper of all Bai tubing and casing is 1:16 (1.588mm / 25.4mm)

(2) The taper of casings with offset ladder thread no more than 13-3 / 8 is 1:16 (1.588mm / 25.4mm)

The taper of casings not less than 16 is 1:12 (2.117mm / 25.4mm)

2. Tooth height:

(1) Tubing round thread 10 teeth / 25.4mm teeth height is 1.41mm 8 teeth / 25.4mm teeth height is 1.81mm

(2) Casing round thread 8 threads / 25.4mm thread height is 1.81mm

(3) Casing deviation ladder thread 5 threads / 25.4mm thread height is 1.58mm

3. Pitch:

(1) 10 thread / 25.4mm pitch is 2.54mm

(2) 8 teeth / 25.4mm pitch is 3.175

(3) 5 teeth / 25.4mm pitch is 5.08