Apache Brass 1/2 in. D Breather Vent 1 pk

Breather vent plugs have a hex head brass body with male pipe threads and a 40 micron filter end. It is designed to provide vacuum relief on gear boxes, oil tanks and reservoirs. It is also used to convert double action cylinders into single action cylinders and prevent foreign matter from entering the unused opening. This vent plug can be easily removed and cleaned.