O-RINGS

KOK manufactures standard and custom O-rings for static and dynamic sealing applications across automotive, industrial, medical, semiconductor, and specialty environments.

O-rings are widely used due to their simplicity and reliability, providing effective sealing between mating surfaces under pressure, temperature variation, and chemical exposure.

INDUSTRIES & APPLICATIONS

• Healthcare and medical
• Communications and cabling
• Semiconductor

STANDARD RANGES

• Aerospace standard AS568A
• ISO metric
• British Standard BS
• Japanese Industrial Standard JIS B2401 P, G, S and V series

CUSTOM SOLUTIONS

• X-rings (X-profile rings)
• D-ring seals
• T-seals
• Square rings
• O-rings without burrs for medical and healthcare applications
• O-rings with batch traceability stampings
• O-rings for fiber optic cable connectors
• AS4020 approved O-rings for drinking water
• O-rings for semiconductor applications
• O-rings requiring AED (anti-explosive decompression) up to 19 MPa

MATERIAL OPTIONS

KOK O-rings can be produced in a wide range of elastomer compounds depending on application requirements, including NBR, FKM, EPDM, HNBR, VMQ, and other specialized materials selected for chemical compatibility, temperature resistance, and sealing performance.