screw Caps with Septa

The Screw Caps that are inlcuded with this kit are knurled on the sides for excellent gripping and comfort when applyting to the vial.

Due to their artificially reduced cap height screw caps don’t have a standardized thread design. Therefore, it is recommendable only to use vials and closures from one source of supply, in order to ensure a harmonious and tight matching of both components

The Screw Caps that are inlcuded with this kit are knurled on the sides for excellent gripping and comfort when applyting to the vial.

Screw Cap Vials are universal. Screwing the cap applies a mechanical force that squeezes the septum between the glass rim and the cap. Screw caps form an excellent seal and mechanically hold the septum in place during piercing. No tools are required for assembly. 

Caps are available pre-assembled with separate septa or without septa. We also offer Polypropylene Hole Caps with bonded septa to ensure that the septa will not slip off the cap during injection. PTFE/Silicone/PTFE septa provide superior performance with any autosampler using a large diameter, blunt-tipped needle.