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Sealing washers are used to close the flange / screw against pressure compared to flat washers. Common usage areas of the super (O-ring) washers are the automotive industry plus the hydraulic and pneumatic sectors.
Nitrile rubber (NBR)
Resistant to oil and air pressure
Resistance to heat and cold
Inelastic surface
Provides excellent durability
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BSP Dimensions
| Size | Internal Dia | External Dia | Thickness |
| 1/8" | 10.4 | 15.8 | 2 |
| 1/4" | 14 | 20.6 | 2 |
| 3/8" | 17.3 | 23.7 | 2 |
| 1/2" | 21.7 | 28.6 | 2 |
| 3/4" | 28.6 | 34.8 | 2 |
| 1" P | 34.3 | 42.8 | 2.5 |
| 1 1/4" | 43.4 | 52.4 | 2.5 |
| 1 1/2" | 48.8 | 58.6 | 2.5 |
| 2" P | 61.9 | 73 | 2.5 |
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Metric Dimensions
| Size | Internal Dia | External Dia | Thickness |
| M5 | 6 | 9 | 1 |
| M6 | 7 | 11 | 1 |
| M8 | 9.4 | 13 | 1 |
| M10 | 10.9 | 16 | 1.5 |
| M12 | 13.1 | 18 | 1.5 |
| M14 | 15 | 22 | 1.5 |
| M16 | 17 | 23.9 | 1.5 |
| M18 | 19.1 | 25.9 | 1.5 |
| M20 | 21 | 28 | 1.5 |
| M22 | 22.9 | 30.1 | 2 |
| M24 | 25 | 32 | 2 |
| M26 | 27 | 35 | 2 |
| M30 | 31.3 | 39 | 2 |
| M33 | 34.3 | 42.8 | 2.5 |
| M34 | 43.4 | 52.4 | 2.5 |