PET BOTTLE CAP — print notes
====================================================

  Neck       PCO-1881 (⌀24.94, pitch 2.7, 1-start)
  Cap        ⌀29.94 × 15.4 mm · plain
  Clearance  0.5 mm radial (printed-on-molded)

  PRINTING
    AS EXPORTED (top on the bed), threads print as rounded
    bumps — NO supports. 0.16 mm layers help the fine pitch.
    PETG flexes onto the neck; PLA can crack. Too tight on your
    brand of bottle? Regenerate with +0.1 mm clearance.

  Parts
    cap         31.1 ×   31.1 ×  15.4 mm   #d9563f

  Notes
    ! Prints top-down (as exported), threads up — NO supports.
    ! PETG over PLA: it flexes onto the molded neck instead of cracking. 0.16 mm layers make the fine PET pitch noticeably smoother.
    ! Too tight on your bottle? Regenerate with +0.1 mm clearance — molded necks vary by brand a little.

