Crystal Pressure Fittings (CPF) from Crystal Engineering, San Luis Obispo, CA, are 316 SS, quick-test pressure fittings for calibration and test applications and designed with an emphasis on safety. The components are based on cone-type, medium-pressure fittings modified by adding an O-ring sealing system and require finger tightening to maintain a leak-free seal up to10,000 psi. Features include 10,000 psi max. allowable working pressure (MAWP) with a 4:1 safety factor; a safety weep hole to warn against disconnections while a system remains under pressure; laser marked fitting type, size, part number, and MAWP to prevent a mismatched connection; and compatibility with HIP, autoclave engineers, and other industry-standard fittings.