MasterLock® Lockout for flange

Special lock for flanges, e.g. blind flanges or flanges with bursting discs, which must not be loosened accidentally. The lock covers a bolt and nut so that it cannot be loosened.
Available in three different sizes:

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Durable and adjustable flange locking system

Durable lock designed to secure and block access to nuts on blind flanges or flanges with bursting discs. The adjustable unit provides a precise fit and prevents flange disassembly during work. Space for four padlocks or shackle lock pairs up to Ø7 mm allowing multiple people to secure the unit simultaneously with personalised padlocks.
Available in three different sizes to fit most types of flanges and different sizes of bolt and nut. Made from durable aluminium and hardened steel to withstand harsh environments.

The product is not EX-rated according to the official certification standards. However, it has undergone rigorous and equivalent tests to fulfil safety requirements in potentially explosive environments. Read more under the Documents tab.

  • Prevents accidental dismantling: Covers and locks access to nuts on blind flanges or flanges with bursting discs during maintenance work.
  • Adjustable for a precise fit: The adjustable cup adapts to different flange sizes for secure and stable locking.
  • Support for multiple users: Four separate locking holes allow simultaneous locking of up to four technicians with personalised padlocks.
  • Durable in harsh environments: Made from robust aluminium and hardened steel that can withstand chemicals, moisture, dirt and temperature fluctuations.
  • Available in three sizes: Several model options to suit different flange types and bolt dimensions.
  • Thoroughly tested: The product has undergone rigorous testing to ensure safety in potentially explosive environments.