Ace Glass Incorporated Plug Stoppers with Front Seal, Nylon or PTFE

Solid plug stoppers are designed for sealing column ends

Plug stoppers feature a "front seal," meaning the O-Ring on the Ace-Thred connection is located at the bottom of the threads rather than the top. This provides a better, more consistent seal. This is critical for pressure applications, and it also prevents viscous materials from migrating up into the threads.

They permit preparation and storage of columns. Each stopper is supplied with one FETFE O-Ring. Plug stoppers are available in Nylon or PTFE.