Autosampler Vial Screw Caps
Fisherbrand™ 24mm PP Screw Seal, White, Closed Top, 24-400 Thread, Assembled Septum
Ready to use combination seals.
Fisherbrand™ 9mm PP Short Thread Seal, Blue, Center Hole, Assembled Septum
Polypropylene caps are chemically inert and suitable for most chromatography applications.
Fisherbrand™ 24mm PP Screw Cap, White, 24-400 Thread
Polypropylene caps are chemically inert and suitable for most chromatography applications.
Fisherbrand™ 24mm PP Screw Seal, White, Center Hole, 24-400 Thread, Assembled Septum
Ready to use combination seals.
Thermo Scientific™ 8mm Autosampler Vial Screw Thread Caps
Available in an variety of styles to match your application. Pre-assembled caps and septa minimize contamination.
Fisherbrand™ 13mm PP Screw Seal, Black, Closed Top, 13-425 Thread, Assembled Septum
Polypropylene caps are chemically inert and suitable for most chromatography applications.
Fisherbrand™ 18mm Magnetic Universal Screw Seal, Silver, Center Hole, Precision Thread, Assembled Septum
Pre-assembled caps and septa are convenient and minimize contamination from handling.
Fisherbrand™ 24mm PP Screw Seal, Bonded, White, 24-400 Thread, Assembled Septum
Pre-assembled caps and septa are convenient and minimize contamination from handling.
Fisherbrand™ 15mm PP Screw Seal, Black, Closed top, 15-425 thread, Assembled septum
Polypropylene caps are chemically inert and suitable for most chromatography applications.
Fisherbrand™ 10mm PP Screw Seal, Black, Center hole, 10-425 thread, Assembled septum
Pre-assembled caps and septa are convenient and minimize contamination from handling.
Fisherbrand™ 8mm PP Screw Seal, Black, Center hole, 8-425 thread, Assembled septum
Polypropylene caps are chemically inert and suitable for most chromatography applications.
Thermo Scientific™ 9 mm Autosampler Vial Screw Thread Caps
Prevent septa push through and over- and under-tightening. With AVCS built into these 9 mm screw caps you will get an optimal, consistent seal every time.
Fisherbrand™ 40mm PP Screw Seal, Black, Closed top, Assembled septum
Polypropylene caps are chemically inert and suitable for most chromatography applications.
Fisherbrand™ 13mm PP Screw Cap, 13-425 thread
Polypropylene caps are chemically inert and suitable for most chromatography applications.
Thermo Scientific™ 13mm Autosampler Vial Screw Thread Caps
13mm Screw Thread Caps feature a 13-425 thread finish. Available in an assortment of styles, pre-assembled caps and septa minimize contamination.
Fisherbrand™ 9mm PP Short Thread Seal, Red, Center hole, Assembled septum
Polypropylene caps are chemically inert and suitable for most chromatography applications.
Thermo Scientific™ National Screw Thread Caps with Bonded Septa
Effectively eliminate septa push-through with Thermo Scientific™ National Screw Thread Caps with Bonded Septa.
Thermo Scientific™ 10mm Autosampler Vial Screw Thread Caps
10mm Wide Opening Screw Caps and Septa feature a 10-425 thread finish and are available in an assortment of styles to match your application needs.
Fisherbrand™ 10mm PP Screw Cap, Black, 10-425 thread
Polypropylene caps are chemically inert and suitable for most chromatography applications.
Fisherbrand™ 9mm PP Short Thread Seal, Blue, Closed top, Assembled septum
Polypropylene caps are chemically inert and suitable for most chromatography applications.
Fisherbrand™ 9mm PP Short Thread Seal, Black, Center hole, Assembled septum
Polypropylene caps are chemically inert and suitable for most chromatography applications.
Fisherbrand™ 8mm PP Screw Cap, 8-425
Polypropylene caps are chemically inert and suitable for most chromatography applications.
Fisherbrand™ 9mm PP Short Thread Seal, Bonded, Center hole, Assembled septum
Polypropylene caps are chemically inert and suitable for most chromatography applications.
Macherey-Nagel™ Screw Cap with Center Hole, N8
Enables easy needle penetration and resealability with reduced handling and contamination risk and with no interfering peaks. Macherey-Nagel™ Screw Cap with Center Hole, N8 are pre-assembled, ready to use caps with medium-soft septa for use with N8 screw cap chromatography vials.
Fisherbrand™ 18mm PP Screw Seal, Black, Closed top, 18-400 thread, Assembled septum
Polypropylene caps are chemically inert and suitable for most chromatography applications.
Fisherbrand™ 13mm PP Screw Seal, Black, Center hole, 13-425 thread, Assembled septum
Pre-assembled caps and septa are convenient and minimize contamination from handling.
Fisherbrand™ 9mm PP Short Thread Seal, Transparent, Center hole, Assembled septum
Polypropylene caps are chemically inert and suitable for most chromatography applications.
Fisherbrand™ 13mm PP Screw Seal, White, Closed top, 13-425 thread, Assembled septum
Polypropylene caps are chemically inert and suitable for most chromatography applications.
Autosampler vials are a specific type of vial used by autosamplers for automated sample retrieval and injection into HPLC, GC or MS analytical instrumentation. Autosampler vial caps (also known as vial closures or seals), can be screw cap, crimp cap or snap closures, but whatever their type, it is important that they offer a secure, tight seal to prevent sample leakage, evaporation and contamination. Autosampler vial screw caps are a commonly used closure type. They comprise the outer screw cap itself, made of polythene, polypropylene, phenolic resin or aluminium, fitted with inner autosampler vial septa made of softer, flexible materials such as PTFE, natural rubber or silicone, or as multilayers of several of these materials.
Autosampler screw caps have a central hole for autosampler needle insertion and sample retrieval, and the septa may also be pre-slit for easier needle penetration. Screw closures are often supplied as caps complete with pre-bonded septum seals to minimise contamination from handling and minimise leakage, but can also be sold as separate components.
There are a range of cap options available, the choice of which may be dependent on autosampler compatibility and the potentially sensitive or aggressive nature of the sample itself: