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These locking caps ensure safety and reduce the possibility of misuse and vandalism with compressed gas cylinders by limiting access to the main cylinder control and regulator attachment. They are designed to fit most North American high and low pressure cylinders and meet standards of DOT and CGA by attaching securely to the collar of the cylinder. Cylinder Safety Caps are available with fine and coarse thread configurations. Stocked units are enamel painted in safety yellow and are supplied with a weather resistant, keyed brass padlock.