Vented Screw

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About Vented Screw

Vented screws have a through hole along the axis so trapped air under a blind counterbore can escape. Essential in vacuum chambers and semiconductor equipment, where a trapped pocket outgasses forever.

Standards DIN 912 vented · ISO 4762 vented

304 / 316 stainless

Low outgassing and corrosion resistant.

Alloy steel

Where strength matters and vacuum level is moderate.

How to choose

• Avoid zinc or cadmium plating and oily lubricants in vacuum service.
• The counterbore needs a vent path too, not just the screw.