O-ring 4.90 x 1.90 FPM80 (4.9 x 1.9)

inner diameter d1: 4.9 mm
cross-sectional diameter d2: 1.9 mm
material: FPM (sometimes referred to as FKM) – fluorocarbon rubber; the most common trade name is Viton
hardness: 80 Shore A

O-rings are precision-formed circular sealing elements with high accuracy. The most suitable application of an O-ring is static; for dynamic applications certain limitations apply and must be respected.

The size of the groove — and therefore the sealing pressure — depends on whether the application is hydraulic or pneumatic. When choosing the groove width, make sure it is wider than the deformed O-ring.