O-ring, 27 x 2.5 mm – Viton, Part# 23970436 – vacstellar

This is a Busch replacement O-ring (Part #23970436). It has an inner diameter of 27 mm and a cross-section (thickness) of 2.5 mm. It is made from high-performance Viton. This O-ring is used to create a reliable, leak-tight seal in specific parts of your Busch vacuum pump or system. 

This specific O-ring (size 27×2.5 mm) is used in various Busch vacuum pump models. You might find it sealing end covers, flanges, or other internal connections. Using the Busch part ensures your pump maintains its original performance and reliability.

Keep your Busch pump sealed tight with this Viton O-ring. It is a small part that makes a big difference in keeping your vacuum strong.