Stopcocks, Double Oblique Bore, Glass Plugs, High Vacuum

Solid glass high vacuum stopcock with the Chemglass constant pressure retention device. This unique retaining system incorporates a glass plug having an extended snelling which accepts a stainless steel spring and clip. The spring keeps constant tension on the plug at all times and is easily removed and attached. Similar to CG-458, but with two parallel oblique bores. Plug is precision ground and hand-lapped  with corresponding numbers on the barrel and plug.

Each stopcock is supplied complete with a stainless steel spring and clip.  Replacement retention kit consists of one spring and clip for the plug size listed.