Tools

Thread Size Charts

NPT, BSP and metric thread sizes and a thread identifier for instrument fittings. Every tool explains the standard behind the answer.

All Thread Size Charts

NPT Thread Size Chart (ASME B1.20.1)1/2" NPT, TPI BSP Thread Size Chart (BSPP and BSPT)G 1/2, R 1/2 Metric Thread Chart and Tap Drill SizesCoarse pitch, Fine pitch Pipe Thread Identifier (NPT, BSP or Metric)Measure OD, Count TPI

Frequently Asked Questions

Are these Thread Size Charts free?

Yes. Every tool on instrumentationblog.in is free, runs in your browser and needs no sign up.

Which standards are the tools based on?

Each tool names the standard it follows, such as ISA 5.1, IEC 60529, NEMA 250, IEC 60079, IEC 60584 or IEC 60751. Always confirm critical work against the current edition of the standard and the manufacturer data.

More Instrumentation Tools

Instrument Tag Decoder2 tools IP, NEMA and Ex Rating Decoder4 tools Wire and Cable Color Codes4 tools PID Tuning Tools6 tools P&ID Symbols4 tools Pipe and Flange Charts3 tools Communication Protocols8 tools Troubleshooting Guides8 tools Practice Tests8 tools Calculators184 engineering calculators Unit Converters76 converters, 700+ units