Thermo Scientific™ 13mm Autosampler Vial Crimp Caps. 14 mm Snap/Crimp Caps and Septa are available in an assortment of materials. Pre-assembled caps and septa minimize contamination from handling. Pricing and Availability. Thermo Scientific™ 8mm Autosampler Vial Crimp Caps. 8mm Crimp Top Closures provide a leak-resistant seal, feature 4mm