Important:

Larger countersinks in thinner materials will enlarge the inner hole diameter. This can cause issues with your part fitment. Please make sure to account for this when designing your parts.

Countersinking is a vital process in sheet metal fabrication, particularly when creating components that require a smooth surface with no protruding screw heads or fasteners. This technique involves enlarging the top portion of a pre-drilled hole, creating a tapered seat that allows flat-head screws or bolts to sit flush with or beneath the surface of the sheet metal.

Name	Units	Hole Size	Outer Diameter
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Hardware

Hardware insertion is the process of installing PEM nuts, studs, standoffs, and other fasteners into sheet metal parts. These components are essential for the assembly of sheet metal parts and are often used to attach other components like PCBs, panels, and other sheet metal parts.

Tapping

Tapping is a method of creating internal threads in pre-cut holes of a sheet metal piece, allowing for secure attachment of threaded components like screws or bolts.

Countersinking Guidelines