Type And Standard Of Thread

Type and standard of thread

1. British straight pipe thread (BSPP), such as G1/4 (in accordance with ISO228-1), tooth Angle 55°

2. British taper pipe thread (BSPT), such as R1 1/4 (conform to ISO7-1), tooth Angle 55°

3. United Thread (UN/UNF), such as 9/16x18UNF (ASME B1.1), mold Angle 60°

4. American taper pipe thread (NPT), such as NPT 1/4 (in accordance with ASME B1.20.1), tooth Angle 60°
   

5. American dry seal pipe thread (NPTF), such as NPTF 1/4, (according to ASME B1.20.3, SAE J476), tooth Angle 60°

6. Metric common thread (M), such as M12X1.5, (according to GB/T 196), tooth Angle 60°