Vented Screw

A vented screw is a screw with a hole or passage through it to allow gas or liquid to escape. It is used in vacuum systems and other applications where trapped air must be released.

A vented screw has a hole through its length that lets gas or fluid pass while it holds a part. It suits vacuum chambers, instruments and sealed housings where pressure must equalise. It takes a nut or a tapped hole of the same thread, and a seal can be added under the head.

This kind of screw is often made in stainless steel or brass. The material affects corrosion resistance and vacuum compatibility.

This is a general guide to checking this kind of part. It says nothing about any supplier's parts.

Ask for a certificate of conformance and check the vent hole and thread on receipt. Confirm the dimensions and material against the order.