O-Ring Brands and Engineering Resources
Compare official resources and sourcing identifiers without allowing brand or commercial status to alter engineering calculations.
Independent directory: O Ring Design is not affiliated with or endorsed by the listed brands. Trademarks belong to their respective owners.
Parker O-Rings
Parker Hannifin's O-Ring & Engineered Seals Division publishes the Parker O-Ring Handbook and supplies standard and custom elastomer seals with application-engineering support.
Open referenceTrelleborg Sealing Solutions O-Rings
Trelleborg Sealing Solutions supplies elastomeric O-rings and polymer sealing systems, with material, housing-layout and application resources.
Open referenceFreudenberg Sealing Technologies O-Rings
Freudenberg develops static and dynamic sealing systems, including O-rings, with material research and industry-specific engineering.
Open referenceApple Rubber Products O-Rings
Apple Rubber manufactures standard and custom O-rings and publishes a seal-design guide covering glands, materials, size charts and troubleshooting.
Open referenceMarco Rubber & Plastics O-Rings
Marco supplies stocked and specialty O-rings and publishes material, compatibility, tolerance and groove-design references.
Open referenceNOK O-Rings
NOK is a Japanese sealing manufacturer whose O-ring catalogue covers JIS P/G/V, ISO-equivalent, automotive and AS568-related families.
Open reference