28-400 Caps

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Cap Neck Finish Guide

28mm caps and closures with a 28-400 thread finish.

Caps and closures are measured using two numbers in the format of 28-400 or 28/400: the first number is the distance in millimeters from outer thread to outer thread when looking at the top of the container; the second is a reference to the design of the threads themselves. Review the image to the right in order to understand thread design, to assist you in selecting the correct cap for your bottle or container. Carefully review your container's threads before selecting a cap even if you know the first measurement; not all 20mm caps will fit a 20mm opening, due to the differences in thread types between manufacturers.

  • 28-400 Bottle Cap, Vinyl Lined
    Part #: QP-CAP-00194-EA

    $0.29 $0.23
  • 28-400 Black Ribbed Polypropylene unlined Cap
    Part #: QP-CAP-00346-EA

    $0.14 $0.11
  • 28-400 White unlined Flip Top Cap
    Part #: QP-CAP-00348-EA

    $0.41 $0.32
  • 28-400 Green Thermoset Screw Caps, F217 & PTFE Liner, Each
    Part #: QP-CAP-00557-EA

    $0.67 $0.52
  • 28-400 Ribbed Bottle Cap, Cone Lined
    Part #: QP-CAP-00190-EA

    $0.41 $0.32
  • 28-410 White Ribbed Cap, Foam Lined
    Part #: QP-CAP-00353-EA

    $0.18 $0.14
  • WHEATON® 28-400 PP Caps, White, Foamed Poly Liner, case/144
    Part #: WH-239283

    $30.00 $24.23
  • WHEATON® 28-400 PP Caps, White, Poly Vinyl Liner, case/144
    Part #: WH-239211

    $31.00 $25.10
  • WHEATON® Black Caps, 28-400, Poly Cone Liner, case/144
    Part #: WH-239259

    $73.00 $58.04
  • WHEATON® 28-400 Black Caps, Poly Cone Liner, case/100
    Part #: WH-240119

    $103.00 $81.47
  • 28-400 Black Bottle Cap, 14B Rubber Lined, Autoclavable
    Part #: QP-CAP-00486-EA

    $0.47 $0.37
  • 28-400 Bottle Cap, Aluminum Foil Liner
    Part #: QP-CAP-00193-EA

    $0.37 $0.29