High Pressure Straight Fittings & Adapters with Female NPT connections on one or both ends are used to link high-pressure hoses or tubes with female NPT (National Pipe Taper) fittings. These adapters can handle working pressures up to 15,000 psi, though this can vary based on thread size. Made from durable cold-worked 316 stainless steel, they ensure a secure, leak-proof connection and are available in special materials upon request to meet specific requirements.