The tables below list all the relevant size information for gaskets made to suit BS 3063 Table D or Table E flanges in the Full Face (i.e. with bolt holes) style.
In some cases (especially with smaller gaskets but not limited to these) a certain nominal bore gasket will fit both Table D and Table E flanges. When this occurs it is noted in the Matches Table column of the table(s).
Gasket Measurement Terms Used.
Gasket OD: Outside Diameter of the Gasket.
Gasket ID: Inside Diameter of the Gasket (Centre Hole). If there is no centre hole it is known as a "Blind Gasket". These are typically used at the end of pipelines and can be produced upon request.
Number of Holes / Hole #: The quantity of bolt holes around the outside of the gasket. Almost always an even number for standard flange gaskets.
Hole Diameter / Hole Dia: The diameter of the bolt holes measured across (take the largest measurement you identify). For flange gaskets, all the holes on a specific gasket will have the same diameter.
PCD / Pitch Circle Diameter: The measurement between the centre point of one bolt hole and the centre point of the bolt hole directly opposite it on a flange gasket.
The easiest way to measure PCD is to measure from the inside (closest point to the ID) of one hole and the outside (closest to the ID) of the opposite. This will equal the distance between the centres.
BS 3063 Table D Full Face Flange Gasket Size Table.
All Dimensions below are given in millimeters (mm).
| Flange Nominal Bore |
Gasket OD | Gasket ID | Number of Holes |
Hole Diameter |
PCD | Matches Table |
| 15NB | 95 | 21 | 4 | 14 | 67 | E |
| 20NB | 102 | 27 | 4 | 14 | 73 | E |
| 25NB | 114 | 34 | 4 | 14 | 83 | E |
| 32NB | 121 | 43 | 4 | 14 | 87 | E |
| 40NB | 133 | 48 | 4 | 14 | 98 | E |
| 50NB | 152 | 60 | 4 | 19 | 114 | E |
| 65NB | 165 | 76 | 4 | 19 | 127 | E |
| 80NB | 184 | 89 | 4 | 19 | 146 | E |
| 90NB | 203 | 102 | 4 | 19 | 165 | - |
| 100NB | 216 | 114 | 4 | 19 | 178 | - |
| 125NB | 254 | 140 | 8 | 19 | 210 | E |
| 150NB | 279 | 168 | 8 | 19 | 235 | - |
| 200NB | 337 | 219 | 8 | 19 | 292 | - |
| 250NB | 406 | 273 | 8 | 22 | 356 | - |
| 300NB | 457 | 324 | 12 | 22 | 406 | - |
| 350NB | 527 | 381 | 12 | 25 | 470 | E |
| 400NB | 578 | 432 | 12 | 25 | 521 | E |
| 450NB | 641 | 483 | 12 | 25 | 584 | - |
| 500NB | 705 | 533 | 16 | 25 | 641 | E |
| 600NB | 825.5 | 635 | 16 | 29 | 756 | - |
BS 3063 Table E Full Face Flange Gasket Size Table.
All Dimensions below are given in millimeters (mm).
| Flange Nominal Bore |
Gasket OD | Gasket ID | Number of Holes |
Hole Diameter |
PCD | Matches Table |
| 15NB | 95 | 21 | 4 | 14 | 67 | D |
| 20NB | 102 | 27 | 4 | 14 | 73 | D |
| 25NB | 114 | 34 | 4 | 14 | 83 | D |
| 32NB | 121 | 43 | 4 | 14 | 87 | D |
| 40NB | 133 | 48 | 4 | 14 | 98 | D |
| 50NB | 152 | 60 | 4 | 19 | 114 | D |
| 65NB | 165 | 76 | 4 | 19 | 127 | D |
| 80NB | 184 | 89 | 4 | 19 | 146 | D |
| 90NB | 203 | 102 | 8 | 19 | 165 | - |
| 100NB | 216 | 114 | 8 | 19 | 178 | - |
| 125NB | 254 | 140 | 8 | 19 | 210 | D |
| 150NB | 279 | 168 | 8 | 22 | 235 | - |
| 200NB | 337 | 219 | 8 | 22 | 292 | - |
| 250NB | 406 | 273 | 12 | 22 | 356 | - |
| 300NB | 457 | 324 | 12 | 25 | 406 | - |
| 350NB | 527 | 381 | 12 | 25 | 470 | D |
| 400NB | 578 | 432 | 12 | 25 | 521 | D |
| 450NB | 641 | 483 | 16 | 25 | 584 | - |
| 500NB | 705 | 533 | 16 | 25 | 641 | D |
| 600NB | 825.5 | 635 | 16 | 32 | 756 | - |
Other Flange Specification Sizing
If the gasket size you're looking for isn't listed on any of the above tables it may suit a different flange spec. We have sizing tables for many of the most common ones used in Australia. You can access our current list via our Flange Table Gasket Dimensions Menu Page.
For more information, help finding the correct sizing or to enquire about custom cut gaskets in all kinds of materials and sizes, please do contact us.