Decreasing Component Size

flux

1:54

Determining mounting hole choices.

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Searching: "Mounting hole 3.2mm"

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Here are two common mounting-hole sizes—M3 and M2—with board-mount footprints available in the Flux library. Pick the one that matches your enclosure’s screw size:

M3 Screw (3.2 mm Clearance)

PartDescriptionMountDesignator Prefix
Mounting Hole 3.2mm DIN965 PadThrough-hole hole, 3.2 mm drill, DIN965 pad for M3 screwThrough HoleH
MountingHole 7.4mm Pad 3.2mm drillThrough-hole hole, 3.2 mm drill, large 7.4 mm pad for extra supportThrough HoleH
Recommendation: For a standard 1.6 mm PCB and M3 mounting hardware, the 7.4 mm-pad footprint gives better mechanical stability.

M2 Screw (2.2 mm Clearance)

PartDescriptionMountPackage Code
MountingHole_2.2mm_M2Through-hole hole, 2.2 mm drill for M2 screwScrewR_2010_5025Metric
M2 Mounting HoleThrough-hole hole, 2.2 mm drill, adjustable pad lengthThrough HoleR_2010_5025Metric
When to use M2 vs. M3:
  • Use M3 (3.2 mm hole) for heavier enclosures or when you need stronger fastening.
  • Use M2 (2.2 mm hole) for lighter applications or where space is tight.
Choose the footprint matching your screw hardware. If you let me know which screw size you’re planning to use (M2 or M3), I can help place the mounting holes into your design.
Use M3 screws
Use M2 screws
Keepout clearance
Three holes placement
Pad size adequacy
227 days

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