Autosampler Vial Caps - 9-425 Screw Closures for HPLC GC Vials - PTFE/Silicone Septa 1 mm

Master Science Autosampler Vial Caps are blue, open-top ribbed screw closures with a 9-425 thread for 2 ml chromatography vials. Each cap is fitted with a 1 mm septum of red PTFE on white silicone.

Two versions are available: a plain septum and a pre-slit septum. The threads are evenly formed so the caps go on smoothly. They are packed 100 to a bag for LC and GC use.

Technical Specifications

Specifications of the Master Science Autosampler Vial Caps:

• Brand: Master Science
• Model Number: MSC0000143SWISS, MSC0000148SWISS
• SKU: MSC0000143SWISS, MSC0000148SWISS
• Brand: Master Science
• Model Number: MSC0000143SWISS (plain septum), MSC0000148SWISS (pre-slit septum)
• SKU: MSC0000143SWISS, MSC0000148SWISS
• Type: Open-top ribbed screw cap
• Cap Colour: Blue
• Cap Thread: 9-425
• Septa: Red PTFE / white silicone, 1 mm thick
• Slit: None / pre-slit
• Application: LC and GC
• Package: 100 pcs per pack

Key Benefits

• Even sealing: Master Science Autosampler Vial Caps have uniformly formed threads.
• Secure grip: ribbed outer wall.
• Dual-layer septum: red PTFE on white silicone, 1 mm.
• Easier needle entry: pre-slit option.
• Matched to standard vials: 9-425 thread.

They fit the Master Science 2 ml autosampler vials.

Product Features

Cap

• Open-top design for needle access
• Ribbed for handling
• Fine, evenly distributed threads

Septum

• Red PTFE / white silicone laminate
• 1 mm thickness
• Plain or pre-slit

Applications

Master Science Autosampler Vial Caps are used for:

• Sealing 9-425 autosampler vials for HPLC
• Sealing 9-425 autosampler vials for GC

Common Problems and How These Caps Help

How Master Science Autosampler Vial Caps support reliable injections:

• Caps that cross-thread: even thread forming.
• Hard needle penetration: pre-slit septa.
• Unsealed vials between runs: screw cap with PTFE/silicone septum.
• Slippery caps with gloves: ribbed surface.