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Master Lock S3920 Valve Butterfly Lockout


  • Durable, lightweight thermoplastic material is chemical resistant and performs effectively in extreme environments.
  • Stainless steel rivet allows device to smoothly pivot open and close to ensure proper fit.
  • Adjustable design fits the majority of butterfly valves.
  • Directional application arrows allow for ease of installation and minimise user error.
  • Compact design allows device to be applied in tight applications.


  • AIMS SKU A0087031
  • Brand Master Lock
  • Model Number S3920
  • Barcode Number 71649198434
SKU: A0087031 On Sale

Master Lock Butterfly Valve Lockout

Master Lock Butterfly Valve Lockout

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Valve Lockout

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