These PTFE chain clamps attach KF-25 connections together via a centering ring.

With its flexible structure wrapping, sealing a vacuum connection (that uses a KF-25 connection) has never been easier.

Simply place a centering ring between the two KF-25 flanges, and wrap the PTFE clamp around them.

After the chain clamp has been wrapped around the flanges, they may be tightened down via the threaded cap and bar piece, providing a tight seal.

The clamps themselves are made of chemically-resistant PTFE, and they will have an extended lifespan compared to chain clamps made from other materials.

These clamps are great for connecting glass adapters to KF-25 connections as well, due to the torque limiter on the chain clamp!