M5 to M33, 1/8" to 2" Washers Bonded Seal Sealing Cushioning O-Ring Metric & BSP
M33 34.3 42.8 2.5. 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.