15mm Caps

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Cap Neck Finish Guide

15mm caps and closures include 15-425 caps for standard glass or plastic containers and 15-415 thread finishes specifically for Wheaton® plastic dropper bottles.

Caps and closures are measured using two numbers in the format of 15-425 or 15/425: 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.

  • 15-425 Bottle Cap, Aluminum Foil Liner
    Part #: QP-CAP-00120-EA

    $0.16 $0.15
  • 15-425 unlined Hole Cap
    Part #: QP-CAP-05060-EA

    $0.16 $0.15
  • 15-425 Polypropylene Caps, White, PTFE Liner, case/144
    Part #: WH-239226

    $61.00 $48.89
  • 15-415 Caps, Phenolic Black Caps, PTFE Liner, case/200
    Part #: WH-240463

    $220.00 $175.48
  • 15-425 PP Caps, White, Foamed Poly Liner, case/144
    Part #: WH-239274

    $47.00 $37.19
  • 15-425 Green Ribbed Thermoset Caps, PTFE Liner, Each
    Part #: QP-CAP-00548-EA

    $0.32 $0.31
  • 15-425 PP Caps, White, PTFE /Silicone, Liner .060, case/250
    Part #: WH-W240832

    $246.00 $196.09
  • 15-415 Caps, PP White, Foamed Poly Liner, case/200
    Part #: WH-242210

    $45.00 $35.75
  • 15-425 Black Caps, Poly Cone Liner, case/144
    Part #: WH-239250

    $61.00 $48.98
  • 15-425 Caps, Phenolic Black Caps, PTFE Liner, case/200
    Part #: WH-240409

    $210.00 $167.39
  • 15-425 Caps, White Urea with Foil Liner, case/1000
    Part #: WH-241009

    $150.00 $119.59
  • 15-425 PP Caps, White, Poly Vinyl Liner, case/144
    Part #: WH-239202

    $46.00 $37.03
  • 15-425 PP Caps, White, PTFE /Silicone, Liner .060, case/1000
    Part #: WH-W240833

    $848.00 $677.23