National Scientific 8-425 Screw-Thread Vials National Scientific Unassembled Vial Kits. Combining top-notch and uncompromising quality with an affordable price the Thermo Scientific 8-425 Screw-Thread Vials Thermo Scientific Unassembled Vial Kits C4013-15/ 66030-450 can fulfill your laboratory needs while still offering a great value for the money. Preferred for use with many carousel tray autosamplers. Vials 66065-262 are manufactured from clear 33 expansion borosilicate glass. Tapered polypropylene MicroVial limited volume vials (66030-982 and 66065-148) are designed for limited volume applications. Conical-style Polyspring inserts are available in borosilicate glass or polypropylene. National Scientific 8-425 Screw-Thread Vials National Scientific C4013-15 Unassembled Vial Kits