May 27, 2021 · HPLC and GC Vials, Caps, Septas and Inserts Guide. 2020/03/22 · 2mL HPLC Clear Vials, Screw Part 5 Autosamper Vial Product List (Bestsellers) . Screw 8-425 (8mm, N8) HPLC Vial, Cap, Septa and Inserts They are made with a 5.5 mm opening. These vials are designed to work on most. 2021-05-27.