Thermolite™ Septa. Temperature (English) Inlet. 644°F. Temperature (Metric) Inlet. 340°C. 3. Thermo Scientific™ 13mm Autosampler Vial Septa. 13mm Septa for use with threaded caps Snap/Crimp Caps are available in PTFE/ Red Rubber, PTFE/Silicone or Red PTFE/White Silicone/Red PTFE. Pricing &