Information for the selection of screw vials & Caps

Description of the screw threads and the nomenclature that goes with it

Most Autosampler screw threads are GPI (Glass Packaging Institute) Threads, an US standard for screw threads of glass vials. The following screw threads are used for 2 ml Autosampler Vials:

   
     

Narrow Mouth (NM) screw vials & caps 8-425

The first number defines the outer diameter of the screw thread (8 mm). The second number refers to the cap type in this case a relatively short thread.

Narrow Mouth Vials with a 8-425 thread have a neck opening of approx. 5.3 mm.

 
Narrow Mouth
Screw Vials
For Japanese Autosampler, where the vial hangs in the rack by the cap, the 8 mm screw cap needs a flange.  

Agilent Technologies compatible (HP) screw caps 9-425

This is a 9 mm thread which was especially developped for AgilentAutosamplers so that the Robotic Arm System can handle screw vials.

Agilent Technologies compatible Screw Vials have a neck opening from 5 to 6 mm.

 
Agilent compatible
Screw Vials
 

Wide Mouth (WM) screw vials & caps 10-425

The first number defi nes the outer diameter of the screw thread (10 mm).
The second number refers to the cap type in this case a relatively short thread.

Wide Mouth Vials with a 10-425 thread have a neck opening of approx. 6.1 mm

 
Wide Mouth
Screw Vials
 
     
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