3-piece construction–nut, sleeve & body with attached insert; 3-end compression ; For use with copper, brass, aluminum or plastic tubing ; Standard fittings use short nuts–long nuts needed for higher-vibration applications ; Temperature range: -65deg F-250deg F ; Easy to disassemble–no flaring tool required ; Ideal for use with water, gasoline, oil & vacuum lines ; Tube OD size: 1/4″ compression ; 3/8″ compression ; Thread size: 7/16-24 ; Thread size: 9/16-24;