10 inch NPT Thread Dimensions — ASME B1.20.1
10 inch (DN 250) to ASME B1.20.1: Threads — per inch 8 mm; Pitch 3.175 mm; Pipe OD 273.05 mm; Hand-tight 30.73 mm; Effective thread 48.90 mm.
Key to dimensions
10 inch NPT Thread Dimensions — ASME B1.20.1 — all dimensions
NPT basic thread dimensions
| Dimension | Value | Equivalent |
|---|---|---|
| Threads — per inch | 8 mm | 0.315 in |
| Pitch | 3.175 mm | 0.125 in |
| Pipe OD | 273.05 mm | 10.75 in |
| Hand-tight — L1 | 30.73 mm | 1.21 in |
| Effective thread — L2 | 48.90 mm | 1.93 in |
| Pitch dia at end — E0 | 267.851 mm | 10.55 in |
| Pitch dia at hand-tight — E1 | 269.772 mm | 10.62 in |
Values are nominal, from NPT Thread Dimensions — ASME B1.20.1. Verify critical dimensions against the current edition of the standard before design, purchase or fabrication.
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FAQ
10 inch NPT Thread Dimensions — ASME B1.20.1: common questions
What are the 10 inch NPT Thread Dimensions — ASME B1.20.1?
10 inch (DN 250) to ASME B1.20.1: Threads — per inch 8 mm; Pitch 3.175 mm; Pipe OD 273.05 mm; Hand-tight 30.73 mm; Effective thread 48.90 mm.
Does Teshi Group manufacture 10 inch forged fittings?
Yes. Teshi Group is an OEM manufacturer in India of forged fittings to ASME B1.20.1, in carbon, alloy, stainless, duplex, super duplex, nickel alloys, titanium and Cu-Ni, with EN 10204 3.1 certificates.
Can I download the 10 inch dimensions as a PDF?
Yes. Use “Download PDF for this size” on this page to get a single-size, print-ready PDF with the drawing and every tabulated dimension, or download the full NPT Thread Dimensions — ASME B1.20.1 chart.
Need 10 inch forged fittings?
Teshi Group manufactures them in India — send your size, rating and material and get a quote in 24–48 hours.
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