Vented Screw

Also known as / standards: Vented Screw · Vacuum Screw · DIN912 · ISO 4762 · SOCKET HEAD CAP SCREW · SOCKET HEAD · SOCKET HEAD SCREW · SOCKET CAP SCREW · SHCS · ALLEN BOLT · JIS B 1176 · CNS 3932 · CNS 4555 · ASME B18.3.1M

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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.

Also known as Vented Screw · Vacuum Screw

Standards ISO 4762 · DIN 912 · JIS B 1176

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.