API 6A wellhead seals utilize materials meeting specific service conditions including sweet service, sour service (H2S environments), and extreme temperature applications. Common elastomeric materials include nitrile (NBR), fluorocarbon (FKM), hydrogenated nitrile (HNBR), and perfluoroelastomer (FFKM) compounds formulated for hydrocarbon compatibility. Metal seals employ stainless ste... https://globalsealstech.com/product-category/oil-gas-seals/api-6a-wellhead-equipment-seals/