Thermo Scientific™ 11 mm Autosampler Vial Crimp Caps. Minimize contamination from handling with pre-assembled caps and septa; compatible with most HPLC and GC autosamplers. Pricing and Availability. Thermo Scientific™ 9 mm Autosampler Vial Screw Thread Caps. Prevent septa push through and over- and under-tightening.