Metal C-ring seals provide high-performance sealing for clamp connectors, valve bonnets, and specialized wellhead equipment requiring rapid connection makeup. The C-shaped cross-section allows radial deflection under bolt load, generating sealing force through elastic deformation rather than plastic flow like RTJ gaskets. https://globalsealstech.com/product-category/oil-gas-seals/api-6a-wellhead-equipment-seals/