Gridfinity Shaker-Proof Small-Parts Bin 2x1 with Clear Flap - Mountless (desk, shelf, case or screw to a panel)
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What it holds: 8 cells under a clear snap-on flap that closes every cell to 0.2 mm, so nothing jumps cells on a bumpy cart. Fits under any clear case lid.

PRINT SETTINGS
  Filament:  PETG
  Walls:     5
  Infill:    35% gyroid
  Orientation: the files are already oriented for printing. Put them on the plate as they load;
               don't rotate them.

FILES AND SUPPORTS
  - case_CI_flap_bin_2x1.stl  (supports: no (unless your slicer warns))
  - case_CI_flap_clear.stl  (supports: no (unless your slicer warns))

HOW IT MOUNTS
  MOUNTLESS (DESK, SHELF, CASE OR SCREW TO A PANEL)
    No mount at all: the holder alone, with a flat base so it stands on a desk or shelf, or sits in a
    drawer or case. Where the back has two small countersunk holes, two countersunk #8 / M4 screws fix
    it to a wall, bench or panel (the notes below say whether this holder has them).

    Notes for this holder: A Gridfinity 2x1 drop-in bin, so it has no mount of its own: it stands on its feet on a desk or in a drawer, or drops into any 2x1 cell of a clear-lid case or the tilt-out drawer (those come with the lip, ToughBuilt, swappable and mountless options). Prints upright, no supports.

HOW IT WORKS
  Tiny parts (set screws, cotter pins, wing nuts) shake into the wrong cell on a moving cart. In this 2x1 Gridfinity bin the dividers stop 0.2 mm under the rim, and a clear flap closes over all 8 cells at once.
  Numbers

  - 8 cells, each 19.5 x 19.1 x 12.2 mm deep
  - 21.7 mm tall overall, so it fits under the clear-lid cases (24.8 limit) and works on its own
  - The flap snaps onto two ears with printed pegs, clicks shut under two front catches and opens with a fingernail at the front scallop
  - Cell names debossed in the flap: SET SCREW, COTTER, WING NUT, SPARE, 1/4 NUT, 3/8 NUT, WASHER, PINS (edit the list in the script)
  - Filament (estimated): bin 18 g, clear flap 6 g
  Drop-in floor compatible with Gridfinity (Gridfinity by Zack Freedman, MIT licence): standard bins, our insert set and community bins all drop into the slots.

OTHER MOUNTS
  More holders and the latest versions: https://cart-tools.sdos-placeholder.workers.dev/#case-ci-flap-bin-2x1

TEST THE FIT FIRST
  Carts, bars and tape rolls vary a little. Before a long print, print the small fit test from the
  Test pieces section of the site (or this part at low infill) and check it on your own gear.

Not affiliated with or endorsed by Magliner, Backstage Equipment, ToughBuilt, Milwaukee, Hollyland, Eartec, Sekonic, Inovativ, Matthews or Manfrotto. Brand names only say what a holder fits.
