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This Ham-Let Let-Lok nut compression fitting is made of stainless steel 316, connects to tubing, and is suitable for use in high-pressure applications. It is made of stainless steel 316 for higher strength and greater corrosion resistance than stainless steel 304 and has a maximum operating temperature range of -100 to +1000 degrees F. This nut is part of a compression tube fitting mechanism that consists of four parts, a body, a front ferrule, a back ferrule and a nut, providing a leak resistant assembly. This nut compression fitting meets American Society for Testing and Materials International (ASTM) A213 and A269 standards for quality assurance and is suitable for use in petrochemical, fluid, power, nuclear, electronic, and other industrial applications.

Tube fittings are components used for connecting, branching, terminating, and changing the direction of tubing in pneumatic and hydraulic systems. They are made of brass, stainless steel, PBT (polybutylene terephthalate), and other materials that resist corrosion and wear. Tube fittings have various types of connections, including threaded, welded, barbed, and push-to-connect (also called one-touch). Push-to-connect connections do not require tools or sealants. Tube fittings are used in various applications, including machine tools, airplane and truck controls, and automated production lines, among others.

Ham-Let manufactures instrumentation valves, pipe, and tube fittings. The company, founded in 1950, meets International Organization for Standardization (ISO) standard 9001.