2 1/2 inch BS 10 Table E Flange Dimensions
2 1/2 inch (DN 65) to BS 10: OD 6 1/2 in; thickness 9/16 in; PCD 5 in; bolts 4; holes 11/16 in.
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)
2 1/2 inch BS 10 Table E Flange Dimensions — all dimensions
BS 10 Table E — flange dimensions
| Dimension | Value | Equivalent |
|---|---|---|
| Size | 65 | |
| Flange OD — D | 6 1/2 in | 165.1 mm |
| Flange OD — D | 165 mm | 6.50 in |
| Steel, heavy series — C | 9/16 in | 14.3 mm |
| Steel, heavy series — C | 14 mm | 0.551 in |
| Steel, light series — C | 13/32 in | 27.8 mm |
| Cast iron — C | 3/4 in | 19.0 mm |
| Bolt circle — K | 5 in | 127.0 mm |
| Bolt circle — K | 127 mm | 5.00 in |
| Number of bolts | 4 | |
| Hole dia — L | 11/16 in | 27.0 mm |
| Hole dia — L | 17 mm | 0.669 in |
| Bolt size | 5/8 |
Values are nominal, from BS 10 Table E Flange Dimensions. Verify critical dimensions against the current edition of the standard before design, purchase or fabrication.
Find another size or standard
Pick a product, standard and size — or just type — to see every dimension and download a watermarked PDF for that one size.
Other sizes — BS 10 Table E Flange Dimensions
Same size in other ratings
Related for this size
2½" Stud Bolt Chart for ASME B16.5 Flanges
Same size — open the dimensions page.
View online · PDFASME B16.202½" ASME B16.20 Spiral Wound Gasket Dimensions
Same size — open the dimensions page.
View online · PDFASME B16.212½" ASME B16.21 Non-Metallic Flat Gasket Dimensions
Same size — open the dimensions page.
View online · PDFASME B36.10M2½" Pipe Schedule Chart — ASME B36.10M
Same size — open the dimensions page.
View online · PDFFAQ
2 1/2 inch BS 10 Table E Flange Dimensions: common questions
What are the 2 1/2 inch BS 10 Table E Flange Dimensions?
2 1/2 inch (DN 65) to BS 10: OD 6 1/2 in; thickness 9/16 in; PCD 5 in; bolts 4; holes 11/16 in.
Does Teshi Group manufacture 2 1/2 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 2 1/2 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 E Flange Dimensions chart.
Need 2 1/2 inch flanges?
Teshi Group manufactures them in India — send your size, rating and material and get a quote in 24–48 hours.
Ready to build to spec?
Share your drawing, bill of materials or technical requirements with the Teshi team.