20 inch BS 10 Table J Flange Dimensions
20 inch (DN 500) to BS 10: OD 737 mm; thickness 64 mm; PCD 26 1/2 in; holes 35 mm; bolt size 1 1/4.
Key to dimensions
- D
- Outside diameter of flange
- C
- Flange thickness, excluding raised face unless stated
- K
- Bolt circle (pitch circle) diameter
- n
- Number of bolts
- L
- Bolt hole diameter
- Bolt
- Bolt size (metric M or inch diameter)
20 inch BS 10 Table J Flange Dimensions — all dimensions
BS 10 Table J — flange dimensions
| Dimension | Value | Equivalent |
|---|---|---|
| Size | 500 | |
| Flange OD — D | 737 mm | 29.02 in |
| Flange — C | 64 mm | 2.52 in |
| Bolt circle — K | 26 1/2 in | 673.1 mm |
| Bolt circle — K | 673 mm | 26.50 in |
| Hole dia — L | 35 mm | 1.38 in |
| Bolt size | 1 1/4 |
Values are nominal, from BS 10 Table J Flange Dimensions. Verify critical dimensions against the current edition of the standard before design, purchase or fabrication.
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20 inch BS 10 Table J Flange Dimensions: common questions
What are the 20 inch BS 10 Table J Flange Dimensions?
20 inch (DN 500) to BS 10: OD 737 mm; thickness 64 mm; PCD 26 1/2 in; holes 35 mm; bolt size 1 1/4.
Does Teshi Group manufacture 20 inch flanges?
Yes. Teshi Group is an OEM manufacturer in India of flanges to BS 10, in carbon, alloy, stainless, duplex, super duplex, nickel alloys, titanium and Cu-Ni, with EN 10204 3.1 certificates.
Can I download the 20 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 BS 10 Table J Flange Dimensions chart.
Need 20 inch flanges?
Teshi Group manufactures them in India — send your size, rating and material and get a quote in 24–48 hours.
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