O-ring, 78.74 x 5 mm – Viton, Part# 512662 – vacstellar

Description

This O-ring looks simple, but it does a very important job. It sits between two metal parts inside your vacuum pump. When you tighten those parts, the O-ring gets squeezed. That squeezing action fills any tiny gaps in the metal surfaces. The result is a reliable seal that stops air and oil from leaking out. It also keeps dirt and dust from getting into your pump.