Back to main menu
Wire & Cable
- Back to Shop by categories
- See all Wire & Cable
- AC90 (BX)
- NMD90
- RW90
- TECK
- Flexible and Portable Cords
- T90
- NMWU
- RWU90
- Fire Alarm Cable
- TEW
- TW75 / TWU
- LVT / NBT
- ACWU90
- NS75 / NSF75
- USEI75 / USEI90 / USEB90
- Bare Copper Wire
- Reels
Connectors & Fittings
- Back to Shop by categories
- See all Connectors & Fittings
- Lugs & Terminals
- Wire connectors
- Cable Connectors
- Flexible Conduit Connectors
- Hub Connectors
- Explosion Proof
- Heat Shrink / Cold Shrink Products
Conduit & Cable Accessories
Conduits & Fittings
- Back to Shop by categories
- See all Conduits & Fittings
- Conduits
  - Back to Conduits & Fittings
  - See all Conduits
  - All conduits
  - EMT
  - PVC Rigid
  - Liquidtight
  - Aluminium
  - ENT - PVC flexible
- Liquidtight accessories and fittings
- Condulets & Entrance Caps
- Couplings
- Elbows
- Connectors
- Nipples
- Reducing Bushings & Adapters
- Straps & Spacers
- PVC Boxes & Covers
- PVC End Caps & End Bells
- PVC Conduit Accessories
- Expansion Joints & Sleeves
- Hangers, Clamps & Brackets
Raceway / Cable Tray / Channel Strut
- Back to Shop by categories
- See all Raceway / Cable Tray / Channel Strut
- Channel Strut
- Raceway
- Cable Tray
- Wire Duct
- Other Raceway Products
Wiring Devices, Switch & Receptacle
- Back to Shop by categories
- See all Wiring Devices, Switch & Receptacle
- Switches
- Receptacles
- Wallplates
- Datacom, Telecom & Domotic
- Plugs & Connectors
- Sockets
- Dimmers
- Sensors
- Timers
- Fan Controls
- Pilot Lights
- Service Poles
- Surge Protection
- Wireless Devices
- Other
Distribution Equipment
- Back to Shop by categories
- See all Distribution Equipment
- Breakers
- Transformers
- Meter Centre & Accessories
- Meter Receptacles
- Safety Switches
- Panels & Loadcentres
  - Back to Distribution Equipment
  - See all Panels & Loadcentres
  - Industrial & Commercial
  - Residential
- Panels - Accessories
- Generators
- Capacitors
- Masts & Accessories
- Pole Line Hardware
- Electric Vehicle Charging Equipment
- Grounding Rods / Boxes / Plates
- Bus Duct & Accessories
- Surge Protecting Devices
Electrical Boxes
- Back to Shop by categories
- See all Electrical Boxes
- Indoor Rated
- Outdoor Rated
- Explosion Proof
- Floor, Counter & Desktop
- Box Accessories
Fuses & Accessories
- Back to Shop by categories
- See all Fuses & Accessories
- Time Delay
- Fuses HRC
- Fuses Miniature
- Fuses Blocks / Fuses Holders
- Fuses One -Time
- Fuses Midget
- Fuse Plug Type
- Fuses Tools
- Fuses Reducers
- Fuse kits
- Fuses Automotive & Others
Electrical Enclosures
- Back to Shop by categories
- See all Electrical Enclosures
- Metering Cabinets
- Pushbutton Enclosures
- Pull / Junctions Enclosures
- Telephone / CATV Enclosures
- Lay-in-Duct / Wiring Trough
- Splitter boxes
- Splitter Troughs
- Splitter blocks
- Parts & Accessories
Renewable & Sustainable Energy
- Back to Shop by categories
- See all Renewable & Sustainable Energy
- EV Charging solutions
- Solar Energy Products
  - Back to Renewable & Sustainable Energy
  - See all Solar Energy Products
  - Energy Storage ( Battery )
  - Racking Systems
  - Inverters, PCS
Lighting
- Back to Shop by categories
- See all Lighting
- Lamp bulbs
- Fixtures
- Lighting Fixture Accessories
- Ballasts & drivers
- Lighting Controls
- Emergency Lighting
- Guards
- Lenses
Electrical Tools & Hardware
Heating & Ventilation
- Back to Shop by categories
- See all Heating & Ventilation
- Fans
- Thermostats & Sensors
- Heating Cables
- Baseboard Heaters
- Fan-Forced
- Heating Convection
- Radiant Heating
- Unit Heaters
- Furnaces Electric
- Heat Pump & Air Conditioning
- Heating Explosion-Proof
- Heating Hand Dryer
- Relays / Contactors / Transformers
- Heating Replacement parts
- Central Vacuum Systems
- Heating Others
Data Communication and Networking
- Back to Shop by categories
- See all Data Communication and Networking
- Audio/Video Cables & Connectors
  - Back to Data Communication and Networking
  - See all Audio/Video Cables & Connectors
  - Audio Cables
  - Cable Connectors & Adapters
  - D-Sub Cable Assemblies
  - HDMI Cable Assemblies
  - Coaxial RG Cables
  - Screens Amplifier Speakers Controls
- Copper & Fiber Connectivity
  - Back to Data Communication and Networking
  - See all Copper & Fiber Connectivity
  - Connecting Blocks
  - Connectors & Plugs
  - Cross Connect BIX
  - Fiber Optic Termination & Splicing
  - Inserts & Adapters
  - Outlets
- Fiber Optic Cables
  - Back to Data Communication and Networking
  - See all Fiber Optic Cables
  - Fiber Optic Indoor Cable
  - Fiber Optic Indoor/Outdoor Cable
  - Fiber Optic Outdoor Cable
- Networking Hardware
  - Back to Data Communication and Networking
  - See all Networking Hardware
  - Communication Devices
  - Media Converters
  - Network Extenders
  - Network Interface Devices
  - Wireless Networking Hardware
- Patch Cords
  - Back to Data Communication and Networking
  - See all Patch Cords
  - Copper Media Patch Cords
  - Fiber Optic Patch Cords
  - Fiber Optic Multiple Cable Assemblies
- Patch Panels & Enclosures
- Telecom Equipment
  - Back to Data Communication and Networking
  - See all Telecom Equipment
  - Building Entrance Terminals
  - Telephone Accessories
- Twisted Pair Data Cable - Multi Pairs Cable
  - Back to Data Communication and Networking
  - See all Twisted Pair Data Cable - Multi Pairs Cable
  - Four Pair UTP Data Cables
  - High Pair Count UTP Data Cables
  - Outside Plant Data Cables
  - Unjacketed Cross-Connect Data Cables
- Tools
- Tray Telecom Wire-Mesh & Accessories
- Voltage Regulators / UPS Inverters
  - Back to Data Communication and Networking
  - See all Voltage Regulators / UPS Inverters
  - UPS Inverters
  - Services
  - Racks and Accessories
  - Data Center Software
  - Power Distribution / Power Cords
  - Surge Protection and Power Conditionning
  - Security and Environmental Monitoring
  - Cooling
- Security/Camera
Alarms & Signalling
- Back to Shop by categories
- See all Alarms & Signalling
- Visual & Audio-Visual Signals
- Detectors
- Entry, Access & Intrusion Control
- Audible Signals
- Transformers
- Fire Alarm
Industrial Control & Automation
- Back to Shop by categories
- See all Industrial Control & Automation
- Industrial Connectivity
- Terminal Blocks
- Operator Interface
- Contactors
- Safety Switches and sensors
- Relays
- Automation Products (PLCs)
- Starters
- VFD's, Speed Controllers & Encoders
- Power Supplies & Converters
- Parts & Acccessories
Labelling Systems & Markers
- Back to Shop by categories
- See all Labelling Systems & Markers
- Labels & Placards
- Marking & Barricade Tape
- Markers
- Printers & Ribbons
- Signs
- Tags
Safety
- Back to Shop by categories
- See all Safety
- Clothing
  - Back to Safety
  - See all Clothing
  - Rain Suits
  - Work
  - High Visibility
  - Disposables
  - Welding
  - Others
- First Aid
  - Back to Safety
  - See all First Aid
  - Emergency Wash Stations
  - First Aid Kits
  - Cleaners & Disinfectants
  - Creams & Ointments
  - Dressings & Bandages
  - Defibrillators
  - Others
- Personal Protective Equipment
  - Back to Safety
  - See all Personal Protective Equipment
  - Fall Protection
  - Environmental
  - Hand Protection
  - Hearing Protection
  - Foot Protection
  - Head Protection
  - Respiratory Protection
  - Eyes & Face Protection
  - Ergonomics
Industrial Supply
- Back to Shop by categories
- See all Industrial Supply
- Grinding & Polishing
  - Back to Industrial Supply
  - See all Grinding & Polishing
  - Cutting Discs
  - Grinding Discs
  - Sanding Discs
  - Mounted Abrasives
  - Abrasive Wheels
  - Hand Finishing
  - Power Brushes
  - Parts & Accessories
- Tapes & Adhesives
  - Back to Industrial Supply
  - See all Tapes & Adhesives
  - Glues
  - Sealants
  - Tapes
  - Compounds
- Ladders
  - Back to Industrial Supply
  - See all Ladders
  - Step ladders
  - Platforms
  - Parts & Accessories
- Hand Tools
- Power Tools
- Batteries/chargers
- Cutting Tools / Bits & Blades
- Hardware
- Meters & Testers
- Extension Cords & Accessories
- Power Bars / Temporary Power Center
- Work Lamps / Temporary Lighting / Flashlights
- Lubricants
- Paint & Accessories
- Janitorial
- Hoses & Accessories
- Instrumentation
- Signal & Lock Out
- Welding
- Industrial Conduit Pipe & Accessories
EV Charging solutions
Solar Energy Products
- Back to Shop by categories
- See all Solar Energy Products
- Energy Storage ( Battery )
- Racking Systems
- Inverters, PCS
Hardware, Supplies & Fasteners

Ship to

Your Delivery Method

My Account

Bill to {{vm.session.billTo.firstName}} {{vm.session.billTo.lastName}} ({{vm.session.billTo.customerNumber}} {{vm.session.billTo.properties.guillevin_LegacyAccountNumber}}) Change Account

Sign Out

My Cart

99 + items

Home
Electrical
Industrial Supply
Signal & Lock Out
GRIP TIGHT PLUS CIRCUIT BREAKER LOCKOUT DEVICE – MINIATURE CIRCUIT BREAKERS (120/240 V)

Master Lock

GRIP TIGHT PLUS CIRCUIT BREAKER LOCKOUT DEVICE – MINIATURE CIRCUIT BREAKERS (120/240 V)

MLO-S3821 MFG #: S3821

MLO-S3821_1 - b40ad76e-8951-4d92-8ca7-60fcd5d8ce2c.jpg

Best Seller: No
Dangerous Goods: No
Discontinued: No
Featured Product: No
Green Product: No
Limited Quantity: No
Made in Canada: No
Manufacturer: MASTER LOCK
Mfr Vendor ID: 245
Oversize product: No
Restricted Delivery: No
SPF Product ID: 2581017
Unit of Measure: E
Web Group: 3110100000000

The Master Lock S3821 Grip Tight™ Plus Circuit Breaker Lockout Device fits Miniature Circuit Breakers (120/240 V). Its lightweight, one-piece design easily and consistently installs without use of tools. The stainless steel thumbscrew and toothed jaw provide a tight grip on the circuit breaker handle so device remains secure. Its compact size allows for locking out vertically and horizontally adjacent breakers. Also suitable for multi-pole breakers and tie-bar toggles.