Flat Gaskets (Seals)
Seal: Nitrile rubber black or white
| BSPP Size | Outside Diameter | Inside Diameter | Thickness |
| 3/4″ | 27 mm | 18 mm | 2 mm |
| 1″ | 33 mm | 20 mm | 3 mm |
| 1 1/2″ | 48 mm | 39 mm | 3 mm |
| 2″ | 60 mm | 47 mm | 3 mm |
| 2 1/2″ | 76 mm | 66 mm | 3 mm |
| 3″ | 88 mm | 76 mm | 3 mm |
| 4″ | 113 mm | 102 mm | 3 mm |
| 5″ | 140 mm | 122 mm | 4 mm |
| 6″ | 165 mm | 140 mm | 4 mm |