Master Lock has provided a wide selection of laminated padlocks, Safety Series safety lockout locks & devices, high security locks and special application locks for industrial, security and residential applications for over 75 years. Master Lock continues to bring security and innovation to the world.

• #15LH MASTER LOCK®
  Manufacturer: Master Lock
  
• #3 LONG SHACKLE LOCK
  Manufacturer: Master Lock
  
• #3 MASTER LOCK®
  Manufacturer: Master Lock
  
• #5 MASTER LOCK
  Manufacturer: Master Lock
  
• #5LF MASTER LOCK
  Manufacturer: Master Lock
  
• #7 MASTER LOCK
  Manufacturer: Master Lock
  
• 1500 COMBINATION PADLOCK
  Manufacturer: Master Lock
  
• 175LH RESETTABLE COMBINATION LOCK
  Manufacturer: Master Lock
  
• 240 VOLT CIRCUIT BREAKER LOCKOUT
  Manufacturer: Master Lock
  MASTER LOCK SAFETY SERIES
• 488 LARGE ROTATING PLUG LOCKOUT #488
  Manufacturer: Master Lock
  MASTER LOCK SAFETY SERIES
• 491B LARGE BREAKER LOCKOUT
  Manufacturer: Master Lock
  
• 493B ELECTRICAL BREAKER LOCKOUT
  Manufacturer: Master Lock
  
• 496B WALL SWITCH LOCKOUT
  Manufacturer: Master Lock
  
• 503 RED GROUP LOCK BOX
  Manufacturer: Master Lock
  
• 6270 STEEL CYLINDER LOCK
  Manufacturer: Master Lock
  
• 7035 STEEL BODY LOCK
  Manufacturer: Master Lock
  
• 770 STEEL HASP
  Manufacturer: Master Lock
  
• AIRCRAFT LOCKOUT TAG S4529
  Manufacturer: Master Lock
  In Stock
• AVIATION SAFETY 6 LOCK LOCKOUT KIT
  Manufacturer: Master Lock
  Now in stock
• CABLE LOCKOUT
  Manufacturer: Master Lock
  Master Lock Safety Series
• CIRCUIT BREAKER SWITCH PADLOCK
  Manufacturer: Master Lock
  MASTER LOCK SAFETY SERIES
• ELECTRICAL LOCKOUT KIT
  Manufacturer: Master Lock
  MASTER LOCK SAFETY SERIES
• GAS LOCKOUT ISOLATION ID TAGS
  Manufacturer: Master Lock
  
• GROUP LOCK BOX 498A
  Manufacturer: Master Lock
  MASTER LOCK SAFETY SERIES
• GUARDIAN EXTREME DO NOT OPERATE TAG
  Manufacturer: Master Lock
  
• GUARDIAN EXTREME GREEN SCAFFOLDING TAG
  Manufacturer: Master Lock
  
• GUARDIAN EXTREME RED SCAFFOLDING TAG
  Manufacturer: Master Lock
  
• GUARDIAN EXTREME YELLOW SCAFFOLDING TAG
  Manufacturer: Master Lock
  
• MASTER 1482 LOCKOUT STATION
  Manufacturer: Master Lock
  
• MASTER LOCK 1456E410 PERSONAL LOCKOUT KIT
  Manufacturer: Master Lock
  MASTER LOCK SAFETY SERIES
• MASTER LOCK 176 COMBINATION LOCK w/ KEY OVERRIDE
  Manufacturer: Master Lock
  
• MASTER LOCK 312 WEATHER RESISTANT LOCK
  Manufacturer: Master Lock
  
• MASTER LOCK 422 ECONOMY LOCKOUT HASP
  Manufacturer: Master Lock
  
• MASTER LOCK 427 LOCKOUT HASP
  Manufacturer: Master Lock
  MASTER LOCK SAFETY SERIES
• MASTER LOCK 497A LAMINATED LOCKOUT TAG
  Manufacturer: Master Lock
  MASTER LOCK SAFETY SERIES
• MASTER LOCK 7101D 48 KEY SAFE
  Manufacturer: Master Lock
  
• MASTER LOCK 7127D 240 KEY STORAGE BOX
  Manufacturer: Master Lock
  
• MASTER LOCK ROTATING GATE VALVE LOCKOUT
  Manufacturer: Master Lock
  
• MASTER LOCK S101 EXTREME ENVIRONMENT LOCK COVER
  Manufacturer: Master Lock
  
• MASTER LOCK S202 LOCKABLE & VENTED CONFINED SPACE COVERS
  Manufacturer: Master Lock
  
• MASTER LOCK S2029 AIRCRAFT POWER RECEPTACLE LOCKOUT
  Manufacturer: Master Lock
  In Stock
• MASTER LOCK S2394 MINIATURE BRAKER LOCKOUT
  Manufacturer: Master Lock
  
• MASTER LOCK S3921 BUTTERFLY VALVE LOCKOUT
  Manufacturer: Master Lock
  
• MASTER LOCK S440 12 HOLE SLIDING LOCKOUT HASP
  Manufacturer: Master Lock
  
• MASTER LOCK S450 24 HOLE SLIDING LOCKOUT HASP
  Manufacturer: Master Lock
  
• MASTER LOCK® 410 SERIES
  Manufacturer: Master Lock
  
• MASTER LOCK® 420/421 LOCKOUT HASP
  Manufacturer: Master Lock
  MASTER LOCK SAFETY SERIES
• MASTER LOCK® 6835 ALUMINUM SERIES
  Manufacturer: Master Lock
  
• MASTER LOCK® STEEL BODY LOCKS
  Manufacturer: Master Lock
  
• PNEUMATIC LOCKOUT
  Manufacturer: Master Lock
  
• PYTHON ADJUSTABLE LOCKING CABLE
  Manufacturer: Master Lock
  
• SMALL PLUG LOCKOUT DEVICE
  Manufacturer: Master Lock
  MASTER LOCK SAFETY SERIES
• STEAM LOCKOUT ISOLATION ID TAGS
  Manufacturer: Master Lock
  
• UNIVERSAL MULTIPOLE CIRCUIT BREAKER LOCKOUT
  Manufacturer: Master Lock
  MASTER LOCK SAFETY SERIES
• WALL SWITCH LOCKOUT COVER
  Manufacturer: Master Lock
  MASTER LOCK SAFETY SERIES