Vented Screws
RediVac® Vented Flat Washers
RediVac® Vented Flat Washers
UC Components Cleaning Process


UC Components’ vented flat washers are proven to be key components in the elimination of virtual leaks* from HV, UHV, and EUV systems. When a screw is tightened over a flat washer, or directly into a tapped hole without a washer, volumes of gas can be trapped in the tapped hole and beneath the fastener head along the screw shaft. Over time, vibration or other factors can cause the screw to loosen, thereby releasing the trapped gas and creating a virtual leak.

Our vented flat washers are available in a wide range of Inch and metric sizes. Inch-measure vented flat washers are manufactured from 300 series stainless steel and meet NAS 620 and AN960 standards. Our metric vented flat washers are made from A2 stainless steel and are manufactured to meet DIN and ISO requirements.

* A virtual leak is a source of gas that is physically trapped within the chamber with only a small, very low-conductance path from the trapped pocket of gas into the chamber proper.

Request a quote on the vented washers your application requires, or contact UC Components.