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Threaded connection standards

Table showing threaded connection standards: BSPP parallel thread ISO 228 & ISO 7 Rp for female thread, BSPT conical thread ISO 7 for male thread only, and NPT conical thread ANSI B1.20 for both male and female threads.Table showing threaded connection standards: BSPP parallel thread ISO 228 & ISO 7 Rp for female thread, BSPT conical thread ISO 7 for male thread only, and NPT conical thread ANSI B1.20 for both male and female threads.