This A-LOK series double ferrule nut meets the standards for CA-360, QQ-B 626 Alloy 360, ASTM-B16 Alloy 360, CA-345, ASTM-B-453 Alloy 345, has a length of 9/16 inch, and is designed for the following applications: air, natural gas, non-potable water. It has an operating temperature of 40 Degrees F to 400 Degrees F, and is made of brass. In addition, it is a double ferrule nut, with an imperial system of measurement, and 9/16"-20 thread. Plus, it has a compression connection type and 11/16 inch h