Diagnostic Vial Caps

Screw caps manufactured by Gramss GmbH for diagnostic vials with neck diameters 14mm, 18mm and 22mm.

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Available Options

  •   Unwadded for use with diagnostic stoppers
  •   EPE (Expanded Poyethylene) wadded
  •   PTFE Wadded for sensitive products
  •   Integral Plug Seal for excellent leak-resistance

Available Unwadded (Suitable for Diagnostic Stoppers), EPE Wadded, PTFE Wadded and with Integral Plug Seal.

  • A - GL14 Smooth
    • 14mm Unwadded Screw Cap
    • 14mm Plug Seal Screw Cap
  • B - GL14 RibbedDiagnostic Screw Caps - 14mm, 18mm, 22mm
    • 14mm Unwadded Screw Cap
    • 14mm Plug Seal Screw Cap
    • 14mm EPE Lined Screw Cap
    • 14mm PTFE (Teflon) Lined Screw Cap
  • C - GL18 Ribbed
    • 18mm Unwadded Screw Cap
    • 18mm Plug Seal Screw Cap
    • 18mm EPE Lined Screw Cap
    • 18mm PTFE (Teflon) Lined Screw Cap
  • D - GL22 Ribbed
    • 22mm Unwadded Screw Cap
    • 22mm Plug Seal Screw Cap
    • 22mm EPE Lined Screw Cap
    • 22mm PTFE (Teflon) Lined Screw Cap


We hold a range of different coloured caps in stock and are able to offer colours to your requirement dependent on viable production runs.

Click below to view our PDF guide to Diagnostic Screw Caps

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