This standard specifies the thread profile, basic dimension, tolerance, marking and gage of the pipe thread (NPT and NPSC) whose thread angle is 60° and screw thread pair itself is sealable.
This standard is applicable to the sealed thread connection of the pipe, valve, pipe joint, cock and other pipeline fittings.
Contents
1 Scope
2 Normative References
3 Terms and Symbols
4 Thread Profile
5 Thread Type and Coordination
6 Basic Dimension and Tolerance of the Taper Pipe Thread(NPT)
7 Basic Dimension and Tolerance of the Cylindrical Internal Thread (NPSC)
8 Effective Thread Length
9 Theory Location of the Chamfer and The Datum Plane
10 Marking
11 Thread Inspection
Appendix A (Informative) Thread Working Gauge
