Narrow-Mouth (NM) screw vials & caps

Narrow-Mouth screw vials have an 8-425 screw thread. The first number defines the outer diameter of the screw thread (8 mm). The second number defines a typical screw cap type with a relatively short screw thread.

Our Narrow-Mouth vials are made from clear (H) or amber (D) borosilicate glass. The vial neck opening has a ø of 5.3 mm.

Our Narrow-Mouth screw caps are available with non-pigmented silicone/PTFE septum and pigmented silicone/PTFE septum.

Our range of septum material