Metal ring hammer union seals provide maximum pressure and temperature capability for extreme service conditions where composite seals would fail. Solid stainless steel construction withstands pressures exceeding 15,000 PSI and temperatures up to 400°F. Metal-to-metal sealing eliminates extrusion risks and prevents blow-out under severe pressure spikes. These premium seals are ideal for critical high-pressure applications including wellhead connections, BOP flanges, and high-pressure manifolds where seal failure could have catastrophic consequences. Precision machining ensures proper fit and reliable sealing performance in demanding applications.