Screw thread vials & closures for HPLC,GC,MS appliions There’s a screw cap vials price screw top vial for every HPLC,GC,MS instrument,appliion,and budget. Our screw top clear and screw top vial for wholesales glass vials and plastic screw top vials are available in 8mm,9mm,10mm,and 13mm screw threads.