S-seals, spring-energized with anti-extrusion springs, replace traditional O-rings in casing and tubing hanger applications. Molded in HNBR or FKM, they fit O-ring glands or custom profiles. Dual springs on inner/outer diameters prevent extrusion under high pressure. Qualified to API 6A FF/HH and NORSOK M-710, S-seals handle HPHT and sour service, offering superior extrusion resistanc... https://globalsealstech.com/product-category/oil-gas-seals/api-6a-wellhead-equipment-seals/