40 NB IS 1239 Part 2 Steel Pipe Fitting Dimensions
40 NB to IS 1239-2: Min outside diameter 56 mm; Min length 51 mm; Max inside dia of internal parallel thread 45.025 mm.
Key to dimensions
- A
- Centre to face (elbows, tees) — see each table for its own lettering
40 NB IS 1239 Part 2 Steel Pipe Fitting Dimensions — all dimensions
IS 1239-2 Table 6 — steel (mild steel) sockets (mm)
| Dimension | Value | Equivalent |
|---|---|---|
| Min outside diameter | 56 mm | 2.20 in |
| Min length | 51 mm | 2.01 in |
| Max inside dia of internal parallel thread | 45.025 mm | 1.77 in |
IS 1239-2 Table 8 — elbows, tees and crosses, equal (screwed) (mm)
| Dimension | Value | Equivalent |
|---|---|---|
| Min length, centre to face | 52 mm | 2.05 in |
IS 1239-2 Table 4 — bends 90° and springs (mm)
| Dimension | Value | Equivalent |
|---|---|---|
| Bend 90° A approx centre to face | 165 mm | 6.50 in |
| B | 219 mm | 8.62 in |
| R approx radius | 127 mm | 5.00 in |
| Spring 112.5° C centre to face | 149 mm | 5.87 in |
| Spring 135° D | 143 mm | 5.63 in |
| Spring 157.5° E | 140 mm | 5.51 in |
IS 1239-2 Table 5 — return bends (mm)
| Dimension | Value | Equivalent |
|---|---|---|
| A approx centre to centre | 165 mm | 6.50 in |
| B approx back to face | 178 mm | 7.01 in |
IS 1239-2 Table 2 — running, close taper and barrel nipples (mm)
| Dimension | Value | Equivalent |
|---|---|---|
| Running nipple A | 38 mm | 1.50 in |
| Close taper nipple B | 51 mm | 2.01 in |
| Barrel nipple C | 70 mm | 2.76 in |
IS 1239-2 Table 28 — hexagon nipples, equal (mm)
| Dimension | Value | Equivalent |
|---|---|---|
| L basic gauge length + clearance | 24 mm | 0.945 in |
| T hexagon thickness | 13 mm | 0.512 in |
| A min overall length | 61 mm | 2.40 in |
| C max bore | 38 mm | 1.50 in |
| B width across flats | 52.0 mm | 2.05 in |
Values are nominal, from IS 1239 Part 2 Steel Pipe Fitting Dimensions. Verify critical dimensions against the current edition of the standard before design, purchase or fabrication.
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Other sizes — IS 1239 Part 2 Steel Pipe Fitting Dimensions
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40 NB IS 1239 Part 2 Steel Pipe Fitting Dimensions: common questions
What are the 40 NB IS 1239 Part 2 Steel Pipe Fitting Dimensions?
40 NB to IS 1239-2: Min outside diameter 56 mm; Min length 51 mm; Max inside dia of internal parallel thread 45.025 mm.
Does Teshi Group manufacture 40 NB forged fittings?
Yes. Teshi Group is an OEM manufacturer in India of forged fittings to IS 1239-2, in carbon, alloy, stainless, duplex, super duplex, nickel alloys, titanium and Cu-Ni, with EN 10204 3.1 certificates.
Can I download the 40 NB 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 IS 1239 Part 2 Steel Pipe Fitting Dimensions chart.
Need 40 NB 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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