These Nylon buttons are replacements for your lost or damaged indexing buttons on your WaterSaver Faucet Company laboratory fixture. They are not compatible with other brands such as Chicago Faucet. These buttons screw on easily with an adjustable wrench. The outer thread diameter is ~14.5 mm and the outer diameter of the button is 3/4". The overall height is 3/8" and the height above the threads is ~ 4 mm. THESE ARE SOLD INDIVIDUALLY.
Note: OXY and H2 buttons are only supplied by special order upon the customer providing proof that the valve for which they are purchased is a needle valve that has been specially cleaned for use with such service. This is done for safety reasons, as, for example, 100% oxygen can spontaneously ignite grease or other materials used in other gas systems.