Tylok Fittings & Valves is one of the few instrumentation companies still proudly manufacturing products in the USA. Tylok re ... mains an engineering company at its core, with an emphasis on innovation. In 1955, Cullen Crawford, known as father of the instrumentation fitting industry, founded Tylok. Now on the 3rd generation of the Crawford family, Tylok holds true to its roots, maintaining the highest quality standards and striving for uncompromising consistency and complete customer satisfaction. We are a family-oriented business who believes in relationships. We work relentlessly to provide the best customer service, pricing and delivery for our partners. We know that every situation is not the same and pride ourselves on our flexibility and ability to maneuver where larger, more rigid companies, cannot. Tylok offers Double & Single Ferrule Tube Fittings in Fractional and Metric, High Pressure Ball, Needle, Check and Plug Valves, Metal and PTFE-lined Flex Hose, Quick Connects, Dielectric fittings, Pipe Fittings, Pressure Gauges, Pre-Swaging Kits and Engineered Pre-Fab Kitting Solutions. Contact us today for all of your instrumentation needs. read more