The SILCA Thread-on Schrader Chuck has a 3/16" hose barb on one end and threads onto Schrader valves on the other. Useful when rebuilding a pump or replacing an existing chuck with a thread-on chuck.
When used in conjunction with the thread on SILCA Presta Chuck Head Stainless Steel (available as a separate item) this adapts the pump to quickly and easily inflate tires with either Presta or Schrader type valves.