Screw Cap Vial found in: safePort Screw Cap Vials, Thomas Screw Cap Specimen Vials, Sample Vials, Screw Thread, Clear KG-33 Borosilicate Glass, with Black.. Vials with open top caps (9711B25, B55) Borosilicate glass Consists of screw-necked vials and 9711C10 series open-top screw caps.