Fly Screen Flap

This flap is designed to allow a water hose or cable to pass through the window without disassembling the fly screen

External dimensions: 100mm x 100mm

Internal dimensions: 76mm x 68mm

Material and print recommendation:

PETG or ASA

at least 3 walls and 50% infill (for more stability)

Required additional material (for assembly):

13x countersunk screws M4x10mm

13x hex nuts M4

1x threaded rod M4x70mm or round steel Ø4x70mm

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Update:

26.01.2026 The 90° countersinks for the M4 countersunk screws have been adjusted in depth so that the planned M4x10mm countersunk screws can be used

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Assembly:

1. ATTENTION: The cutout in the fly screen is only made in step 4!!!
2. Insert the nut on the side with the recess for 1 nut (marked in red in the attached image). This will be needed later for mounting the flap
3. Attach the two frames to the fly screen. The fly screen should be taut. Ensure that the nut from step 1 points upwards. The recesses for the 12 hex nuts (on the 1st frame) and the 12 countersinks (on the 2nd frame) must face outwards
4. Ensure that all 12 screws are tightened. Only now should the fly screen be cut within the frame (utility knife)
5. Connect or assemble the flap and holder with the “threaded rod M4x70mm or round steel Ø4x70”
6. Connect the holder and flap with the M4x10 countersunk screw (can be loosened again with just one screw for rework if needed)

Note:

The fly screen will be damaged during assembly by cutting out the recess. The flap should not be disassembled after installation