The Masterlock S3900 securely attaches around a pneumatic fitting to prevent it from being reattached to a pressurised air source.

It can be used wtih all types of pneumatic fitting found inside manufacturing facilities and is constructed from high quality stainless steel to ensure long life and resistance to corrosion.

To use, just clip around the end of the pneumatic fitting and secure with a padlock. The following video shows how to install the lockout:

Key Features

• Completely stops a pneumatic fitting from being attached to a pressurised air source
• Compatible with practically all male pneumatic fittings
• Stainless steel design
• Ideal for use with Master Lock or American Lock padlocks
• Suitable for use with lockout hasps