Sonkit metal C-ring seals are spring-energized metal seals for vacuum, semiconductor, aerospace, and nuclear service. The C-shaped jacket gives high seating load and recovery after thermal cycles. Common jackets are Alloy 718, 316L, and X-750, with optional silver or gold plating. We machine to the customer groove drawing. Use them where elastomer O-rings outgas or fail at temperature or cryogenic duty. Made in Shanghai. ISO 9001:2015.

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