Fully certified to ASTM F1387 standards. Double ferrule compression tube fitting on one end and male NPT connection on the other end. Interchangeable with other major brands including Swagelok and Parker A-Lok. Manufactured from high quality 316 stainless steel for superior mechanical strength and resistance to corrosion. Features radius junction design inside the elbow, providing smooth flow path, minimizing flow resistance and enabling easy system cleaning Precision machining of components guarantees optimal deformation of ferrules and tubing, providing leak-tight and vibration-resistant connections even in harsh or stressful applications. Hardened threads with a smooth surface finish prevent galling and extend the service life. Nut threads are silver-plated to minimize friction against the body threads. Easy to disconnect and retighten. Every FITOK fitting is engraved with details including connection size and type, brand name, material, and heat number, ensuring proper identification, traceability, and quality control.