Open-Top Screw Caps

Use Thermo Scientific™ SureSTART™ 18 mm Precision Screw Caps with screw vials that have an 18 mm opening, including our SureSTART 10 mL and 20 mL Screw Top Headspace Vials (Level 3). Select Level 3 products for ultimate performance and sensitivity from your methods, while maintaining the highest levels of sample security and integrity. Choose from magnetic steel caps with all-purpose silicone/PTFE septa designed to reduce autosampler needle issues. Select High Temperature septa to allow for heating to over 250°C without excessive septum softening or the release of volatile vapors.

Minimize contamination from handling with convenient, pre-assembled Thermo Scientific™ 11 mm Autosampler Vial Crimp Caps, compatible with most HPLC and GC autosamplers. Choose from Thermo Scientific™, National™ or Chromacol™ brands.

Use Thermo Scientific™ SureSTART™ 11 mm Snap Caps with snap vials that have an 11 mm opening, including our SureSTART 2 mL Glass Snap Vials, 1.5 mL Total Recovery Glass Snap Vials, High Recovery Glass Snap Vials, and Glass Snap Microvials for <2 mL samples (Level 3). Select Level 3 products for ultimate performance and sensitivity from your methods, while maintaining the highest levels of sample security and integrity. Choose from soft polyethylene caps with double snap functionality that guarantees a tight seal. Our snap caps include all-purpose silicone/PTFE septa of various hardness values designed to reduce autosampler needle issues. Pre-slit septa options are available for those who want septa that prevent vial-overfilling issues and re-seal well enough to avoid sample evaporation.

Thermo Scientific™ 13mm Screw Thread Caps feature a 13-425 thread finish and are available in an assortment of styles to match your HPLC, GC or IC application needs. Convenient pre-assembled caps and septa minimize contamination from handling. Choose from Thermo Scientific™, Thermo Scientific™ National™, and Thermo Scientific™ Chromacol™ brands.