Standard O-RINGS (NBR) feature good resistance when there are aliphatic hydrocarbons, mineral, vegetable, and animal oils, grease, propane, butane, petroleum.
Static O-Ring Seal - Face Type Seal
Static O-Ring Engineering Design Guide for Static Seals
SEALS - Contarini
Shape: X-Ring Standard or Nonstandard: Standard Model Number: Star ring Thickness 3.53x18.64/20.22/21.82/23.4/24.99 mm Material: Rubber Material: NBR
DINGGUANGHE CS3.53mm NBR X Ring ID 18.64/20.22/21.82/23.4/24.99x3.53mm Double Acting Seal X-Seals Quad Ring AS568 Standard XRing 5PCS Gasket, Rings
SEALS - Contarini
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Static Seals - ATS Srl
Piston Seal Hallite easy to order at
Static & Dynamic O Rings Specialist Sealing Products
O-Rings-Chemical Attack Analysis｜o ring seal supplier-CNL SEALS
ORing eHandbook