Master Lock 6421 ProSeries Weather Tough Interchangeable Core Padlock 2-1/8" (54mm)

  • 6421 CN CY6 KA LZ1 NOKEY

    $39.20 37% Off

    Shackle Length
    1-1/8" Boron
    Chain
    Sash Chain
    Function
    Non-Key Retaining
    Cylinder Type
    Standard SFIC
    Number of Pins
    6 Pins
    Cylinder Type Finish
    Not Included
    Keying
    Keyed Alike
    Custom Marking
    Laser engraved in 1 area
    Number of Key
    0 keys per lock
  • 6421 LF CY4 MK LZ1 3KEY

    $40.34 37% Off

    Shackle Length
    1-1/2" Boron
    Chain
    Not Included
    Function
    Non-Key Retaining
    Cylinder Type
    Standard SFIC
    Number of Pins
    Not Included
    Cylinder Type Finish
    Satin Brass
    Custom Marking
    Laser engraved in 1 area
    Number of Key
    3 keys per lock
  • 6421 LF CN CY7 26D KA LZ1

    $41.84 37% Off

    Shackle Length
    1-1/2" Boron
    Chain
    Sash Chain
    Function
    Non-Key Retaining
    Cylinder Type
    Standard SFIC
    Number of Pins
    7 Pins
    Cylinder Type Finish
    Satin Chrome
    Keying
    Keyed Alike
    Custom Marking
    Laser engraved in 1 area
    Number of Key
    Not Included
  • 6421 LJ NR CY7 26D MK LZ1 4KEY

    $42.88 37% Off

    Shackle Length
    2-1/2" Boron
    Chain
    Not Included
    Function
    Non-Removable Key
    Cylinder Type
    Standard SFIC
    Number of Pins
    7 Pins
    Cylinder Type Finish
    Satin Chrome
    Custom Marking
    Laser engraved in 1 area
    Number of Key
    4 keys per lock
  • 6421 CN CY6 KAMK LZ2 NOKEY

    $42.59 37% Off

    Shackle Length
    1-1/8" Boron
    Chain
    Sash Chain
    Function
    Non-Key Retaining
    Cylinder Type
    Standard SFIC
    Number of Pins
    6 Pins
    Cylinder Type Finish
    Not Included
    Custom Marking
    Laser engraved in 2 areas
    Number of Key
    0 keys per lock
  • 6421 LJ NR CY74 KD LZ1 4KEY

    $40.89 37% Off

    Shackle Length
    2-1/2" Boron
    Chain
    Not Included
    Function
    Non-Removable Key
    Cylinder Type
    Standard SFIC
    Number of Pins
    7 Pins
    Cylinder Type Finish
    Satin Brass
    Keying
    Keyed Different
    Custom Marking
    Laser engraved in 1 area
    Number of Key
    4 keys per lock
  • 6421 LJ NR WCS6 MK LZ3 NOKEY

    $28.97 37% Off

    Shackle Length
    2-1/2" Boron
    Chain
    Not Included
    Function
    Non-Removable Key
    Cylinder Type
    Lock Body Only
    Number of Pins
    6 Pins
    Cylinder Type Finish
    Not Included
    Custom Marking
    Laser engraved in 3 areas
    Number of Key
    0 keys per lock
  • 6421 LJ NR WCS6 26D KAMK LZ3 1KEY

    $29.85 37% Off

    Shackle Length
    2-1/2" Boron
    Chain
    Not Included
    Function
    Non-Removable Key
    Cylinder Type
    Lock Body Only
    Number of Pins
    6 Pins
    Cylinder Type Finish
    Satin Chrome
    Custom Marking
    Laser engraved in 3 areas
    Number of Key
    1 key per lock
  • 6421 LF CY7 26D LZ1 4KEY

    $40.76 37% Off

    Shackle Length
    1-1/2" Boron
    Chain
    Not Included
    Function
    Non-Key Retaining
    Cylinder Type
    Standard SFIC
    Number of Pins
    7 Pins
    Cylinder Type Finish
    Satin Chrome
    Keying
    Not Included
    Custom Marking
    Laser engraved in 1 area
    Number of Key
    4 keys per lock
  • 6421 LJ NR WCS7 MK LZ1 3KEY

    $28.58 37% Off

    Shackle Length
    2-1/2" Boron
    Chain
    Not Included
    Function
    Non-Removable Key
    Cylinder Type
    Lock Body Only
    Number of Pins
    7 Pins
    Cylinder Type Finish
    Not Included
    Custom Marking
    Laser engraved in 1 area
    Number of Key
    3 keys per lock
  • 6421 LJ NR WCS7 26D KD LZ4

    $29.49 37% Off

    Shackle Length
    2-1/2" Boron
    Chain
    Not Included
    Function
    Non-Removable Key
    Cylinder Type
    Lock Body Only
    Number of Pins
    7 Pins
    Cylinder Type Finish
    Satin Chrome
    Keying
    Keyed Different
    Custom Marking
    Laser engraved in 4 areas
    Number of Key
    Not Included
  • 6421 LJ NR WCS7 26D MK LZ2

    $28.68 37% Off

    Shackle Length
    2-1/2" Boron
    Chain
    Not Included
    Function
    Non-Removable Key
    Cylinder Type
    Lock Body Only
    Number of Pins
    7 Pins
    Cylinder Type Finish
    Satin Chrome
    Custom Marking
    Laser engraved in 2 areas
    Number of Key
    Not Included
  • 6421 LF CY7 26D MK LZ1 3KEY

    $41.45 37% Off

    Shackle Length
    1-1/2" Boron
    Chain
    Not Included
    Function
    Non-Key Retaining
    Cylinder Type
    Standard SFIC
    Number of Pins
    7 Pins
    Cylinder Type Finish
    Satin Chrome
    Custom Marking
    Laser engraved in 1 area
    Number of Key
    3 keys per lock
  • 6421 LJ CN CY4 KD LZ1

    $39.98 37% Off

    Shackle Length
    2-1/2" Boron
    Chain
    Sash Chain
    Function
    Non-Key Retaining
    Cylinder Type
    Standard SFIC
    Number of Pins
    Not Included
    Cylinder Type Finish
    Satin Brass
    Keying
    Keyed Different
    Custom Marking
    Laser engraved in 1 area
    Number of Key
    Not Included
  • 6421 LF WCS KD LZ3 1KEY

    $26.85 37% Off

    Shackle Length
    1-1/2" Boron
    Chain
    Not Included
    Function
    Non-Key Retaining
    Cylinder Type
    Lock Body Only
    Number of Pins
    Not Included
    Cylinder Type Finish
    Not Included
    Keying
    Keyed Different
    Custom Marking
    Laser engraved in 3 areas
    Number of Key
    1 key per lock
  • 6421 CY KD

    $34.12 37% Off

    Shackle Length
    1-1/8" Boron
    Chain
    Not Included
    Function
    Non-Key Retaining
    Cylinder Type
    Standard SFIC
    Number of Pins
    Not Included
    Cylinder Type Finish
    Not Included
    Keying
    Keyed Different
    Custom Marking
    Not Included
    Number of Key
    Not Included
  • 6421 CN WCS 26D MK LZ3

    $30.11 37% Off

    Shackle Length
    1-1/8" Boron
    Chain
    Sash Chain
    Function
    Non-Key Retaining
    Cylinder Type
    Lock Body Only
    Number of Pins
    Not Included
    Cylinder Type Finish
    Satin Chrome
    Custom Marking
    Laser engraved in 3 areas
    Number of Key
    Not Included
  • 6421 LF CN WCS7 LZ4 1KEY

    $32.16 37% Off

    Shackle Length
    1-1/2" Boron
    Chain
    Sash Chain
    Function
    Non-Key Retaining
    Cylinder Type
    Lock Body Only
    Number of Pins
    7 Pins
    Cylinder Type Finish
    Not Included
    Keying
    Not Included
    Custom Marking
    Laser engraved in 4 areas
    Number of Key
    1 key per lock
  • 6421 LJ CN CY74 LZ1 4KEY

    $43.69 37% Off

    Shackle Length
    2-1/2" Boron
    Chain
    Sash Chain
    Function
    Non-Key Retaining
    Cylinder Type
    Standard SFIC
    Number of Pins
    7 Pins
    Cylinder Type Finish
    Satin Brass
    Keying
    Not Included
    Custom Marking
    Laser engraved in 1 area
    Number of Key
    4 keys per lock
  • 6421 WCS7 26D KA LZ1 3KEY

    $25.81 37% Off

    Shackle Length
    1-1/8" Boron
    Chain
    Not Included
    Function
    Non-Key Retaining
    Cylinder Type
    Lock Body Only
    Number of Pins
    7 Pins
    Cylinder Type Finish
    Satin Chrome
    Keying
    Keyed Alike
    Custom Marking
    Laser engraved in 1 area
    Number of Key
    3 keys per lock
  • 6421 CN WCS4 KAMK LZ4 4KEY

    $34.99 37% Off

    Shackle Length
    1-1/8" Boron
    Chain
    Sash Chain
    Function
    Non-Key Retaining
    Cylinder Type
    Lock Body Only
    Number of Pins
    Not Included
    Cylinder Type Finish
    Satin Brass
    Custom Marking
    Laser engraved in 4 areas
    Number of Key
    4 keys per lock
  • 6421 LJ CN NR CY7 26D KD 1KEY

    $39.69 37% Off

    Shackle Length
    2-1/2" Boron
    Chain
    Sash Chain
    Function
    Non-Removable Key
    Cylinder Type
    Standard SFIC
    Number of Pins
    7 Pins
    Cylinder Type Finish
    Satin Chrome
    Keying
    Keyed Different
    Custom Marking
    Not Included
    Number of Key
    1 key per lock
  • 6421 CN WCS6 26D MK LZ2

    $28.71 37% Off

    Shackle Length
    1-1/8" Boron
    Chain
    Sash Chain
    Function
    Non-Key Retaining
    Cylinder Type
    Lock Body Only
    Number of Pins
    6 Pins
    Cylinder Type Finish
    Satin Chrome
    Custom Marking
    Laser engraved in 2 areas
    Number of Key
    Not Included
  • 6421 LF CN NR CY MK LZ3 NOKEY

    $44.64 37% Off

    Shackle Length
    1-1/2" Boron
    Chain
    Sash Chain
    Function
    Non-Removable Key
    Cylinder Type
    Standard SFIC
    Number of Pins
    Not Included
    Cylinder Type Finish
    Not Included
    Custom Marking
    Laser engraved in 3 areas
    Number of Key
    0 keys per lock
  • 6421 LF WCS64 MK LZ1

    $26.04 37% Off

    Shackle Length
    1-1/2" Boron
    Chain
    Not Included
    Function
    Non-Key Retaining
    Cylinder Type
    Lock Body Only
    Number of Pins
    6 Pins
    Cylinder Type Finish
    Satin Brass
    Custom Marking
    Laser engraved in 1 area
    Number of Key
    Not Included
  • 6421 LF WCS7 LZ3 3KEY

    $29.26 37% Off

    Shackle Length
    1-1/2" Boron
    Chain
    Not Included
    Function
    Non-Key Retaining
    Cylinder Type
    Lock Body Only
    Number of Pins
    7 Pins
    Cylinder Type Finish
    Not Included
    Keying
    Not Included
    Custom Marking
    Laser engraved in 3 areas
    Number of Key
    3 keys per lock
  • 6421 LJ CN WCS7 KAMK LZ2 3KEY

    $33.66 37% Off

    Shackle Length
    2-1/2" Boron
    Chain
    Sash Chain
    Function
    Non-Key Retaining
    Cylinder Type
    Lock Body Only
    Number of Pins
    7 Pins
    Cylinder Type Finish
    Not Included
    Custom Marking
    Laser engraved in 2 areas
    Number of Key
    3 keys per lock
  • 6421 NR CY 26D LZ1 1KEY

    $35.52 37% Off

    Shackle Length
    1-1/8" Boron
    Chain
    Not Included
    Function
    Non-Removable Key
    Cylinder Type
    Standard SFIC
    Number of Pins
    Not Included
    Cylinder Type Finish
    Satin Chrome
    Keying
    Not Included
    Custom Marking
    Laser engraved in 1 area
    Number of Key
    1 key per lock
  • 6421 LF WCS7 26D MK LZ4 4KEY

    $33.95 37% Off

    Shackle Length
    1-1/2" Boron
    Chain
    Not Included
    Function
    Non-Key Retaining
    Cylinder Type
    Lock Body Only
    Number of Pins
    7 Pins
    Cylinder Type Finish
    Satin Chrome
    Custom Marking
    Laser engraved in 4 areas
    Number of Key
    4 keys per lock
  • 6421 LF CN NR CY6 26D KD LZ2

    $41.25 37% Off

    Shackle Length
    1-1/2" Boron
    Chain
    Sash Chain
    Function
    Non-Removable Key
    Cylinder Type
    Standard SFIC
    Number of Pins
    6 Pins
    Cylinder Type Finish
    Satin Chrome
    Keying
    Keyed Different
    Custom Marking
    Laser engraved in 2 areas
    Number of Key
    Not Included
  • 6421 LJ CN NR CY 26D KAMK LZ1 3KEY

    $44.15 37% Off

    Shackle Length
    2-1/2" Boron
    Chain
    Sash Chain
    Function
    Non-Removable Key
    Cylinder Type
    Standard SFIC
    Number of Pins
    Not Included
    Cylinder Type Finish
    Satin Chrome
    Custom Marking
    Laser engraved in 1 area
    Number of Key
    3 keys per lock
  • 6421 LF WCS74 KAMK LZ3

    $30.83 37% Off

    Shackle Length
    1-1/2" Boron
    Chain
    Not Included
    Function
    Non-Key Retaining
    Cylinder Type
    Lock Body Only
    Number of Pins
    7 Pins
    Cylinder Type Finish
    Satin Brass
    Custom Marking
    Laser engraved in 3 areas
    Number of Key
    Not Included
  • 6421 LJ CN NR CY4 KA LZ2 4KEY

    $44.86 37% Off

    Shackle Length
    2-1/2" Boron
    Chain
    Sash Chain
    Function
    Non-Removable Key
    Cylinder Type
    Standard SFIC
    Number of Pins
    Not Included
    Cylinder Type Finish
    Satin Brass
    Keying
    Keyed Alike
    Custom Marking
    Laser engraved in 2 areas
    Number of Key
    4 keys per lock
  • 6421 LF NR CY KA LZ4 3KEY

    $43.43 37% Off

    Shackle Length
    1-1/2" Boron
    Chain
    Not Included
    Function
    Non-Removable Key
    Cylinder Type
    Standard SFIC
    Number of Pins
    Not Included
    Cylinder Type Finish
    Not Included
    Keying
    Keyed Alike
    Custom Marking
    Laser engraved in 4 areas
    Number of Key
    3 keys per lock
  • 6421 CN NR CY LZ2 3KEY

    $41.02 37% Off

    Shackle Length
    1-1/8" Boron
    Chain
    Sash Chain
    Function
    Non-Removable Key
    Cylinder Type
    Standard SFIC
    Number of Pins
    Not Included
    Cylinder Type Finish
    Not Included
    Keying
    Not Included
    Custom Marking
    Laser engraved in 2 areas
    Number of Key
    3 keys per lock
  • 6421 LF CN NR CY7 26D KA LZ4 4KEY

    $48.64 37% Off

    Shackle Length
    1-1/2" Boron
    Chain
    Sash Chain
    Function
    Non-Removable Key
    Cylinder Type
    Standard SFIC
    Number of Pins
    7 Pins
    Cylinder Type Finish
    Satin Chrome
    Keying
    Keyed Alike
    Custom Marking
    Laser engraved in 4 areas
    Number of Key
    4 keys per lock
  • 6421 LJ CN NR CY7 26D KD LZ2

    $42.49 37% Off

    Shackle Length
    2-1/2" Boron
    Chain
    Sash Chain
    Function
    Non-Removable Key
    Cylinder Type
    Standard SFIC
    Number of Pins
    7 Pins
    Cylinder Type Finish
    Satin Chrome
    Keying
    Keyed Different
    Custom Marking
    Laser engraved in 2 areas
    Number of Key
    Not Included
  • 6421 CN NR CY KAMK LZ1

    $41.19 37% Off

    Shackle Length
    1-1/8" Boron
    Chain
    Sash Chain
    Function
    Non-Removable Key
    Cylinder Type
    Standard SFIC
    Number of Pins
    Not Included
    Cylinder Type Finish
    Not Included
    Custom Marking
    Laser engraved in 1 area
    Number of Key
    Not Included
  • 6421 LF NR CY6 KD LZ2 NOKEY

    $38.45 37% Off

    Shackle Length
    1-1/2" Boron
    Chain
    Not Included
    Function
    Non-Removable Key
    Cylinder Type
    Standard SFIC
    Number of Pins
    6 Pins
    Cylinder Type Finish
    Not Included
    Keying
    Keyed Different
    Custom Marking
    Laser engraved in 2 areas
    Number of Key
    0 keys per lock
  • 6421 LJ CN NR WCS 26D KA LZ2

    $29.26 37% Off

    Shackle Length
    2-1/2" Boron
    Chain
    Sash Chain
    Function
    Non-Removable Key
    Cylinder Type
    Lock Body Only
    Number of Pins
    Not Included
    Cylinder Type Finish
    Satin Chrome
    Keying
    Keyed Alike
    Custom Marking
    Laser engraved in 2 areas
    Number of Key
    Not Included
  • 6421 CN NR CY 26D MK LZ3 4KEY

    $45.71 37% Off

    Shackle Length
    1-1/8" Boron
    Chain
    Sash Chain
    Function
    Non-Removable Key
    Cylinder Type
    Standard SFIC
    Number of Pins
    Not Included
    Cylinder Type Finish
    Satin Chrome
    Custom Marking
    Laser engraved in 3 areas
    Number of Key
    4 keys per lock
  • 6421 LJ CN NR WCS6 MK LZ2 3KEY

    $31.67 37% Off

    Shackle Length
    2-1/2" Boron
    Chain
    Sash Chain
    Function
    Non-Removable Key
    Cylinder Type
    Lock Body Only
    Number of Pins
    6 Pins
    Cylinder Type Finish
    Not Included
    Custom Marking
    Laser engraved in 2 areas
    Number of Key
    3 keys per lock
  • 6421 LF CN NR WCS 26D KAMK LZ4 3KEY

    $35.22 37% Off

    Shackle Length
    1-1/2" Boron
    Chain
    Sash Chain
    Function
    Non-Removable Key
    Cylinder Type
    Lock Body Only
    Number of Pins
    Not Included
    Cylinder Type Finish
    Satin Chrome
    Custom Marking
    Laser engraved in 4 areas
    Number of Key
    3 keys per lock
  • 6421 LJ CN NR WCS64 LZ3 4KEY

    $32.38 37% Off

    Shackle Length
    2-1/2" Boron
    Chain
    Sash Chain
    Function
    Non-Removable Key
    Cylinder Type
    Lock Body Only
    Number of Pins
    6 Pins
    Cylinder Type Finish
    Satin Brass
    Keying
    Not Included
    Custom Marking
    Laser engraved in 3 areas
    Number of Key
    4 keys per lock
  • 6421 LJ CN NR WCS64 KA LZ2

    $29.26 37% Off

    Shackle Length
    2-1/2" Boron
    Chain
    Sash Chain
    Function
    Non-Removable Key
    Cylinder Type
    Lock Body Only
    Number of Pins
    6 Pins
    Cylinder Type Finish
    Satin Brass
    Keying
    Keyed Alike
    Custom Marking
    Laser engraved in 2 areas
    Number of Key
    Not Included
  • 6421 LJ CN NR WCS7 MK LZ4 3KEY

    $35.58 37% Off

    Shackle Length
    2-1/2" Boron
    Chain
    Sash Chain
    Function
    Non-Removable Key
    Cylinder Type
    Lock Body Only
    Number of Pins
    7 Pins
    Cylinder Type Finish
    Not Included
    Custom Marking
    Laser engraved in 4 areas
    Number of Key
    3 keys per lock
  • 6421 LJ CN NR WCS7 26D MK LZ3 3KEY

    $34.18 37% Off

    Shackle Length
    2-1/2" Boron
    Chain
    Sash Chain
    Function
    Non-Removable Key
    Cylinder Type
    Lock Body Only
    Number of Pins
    7 Pins
    Cylinder Type Finish
    Satin Chrome
    Custom Marking
    Laser engraved in 3 areas
    Number of Key
    3 keys per lock
  • 6421 LF CN NR CY4 KA

    $39.33 37% Off

    Shackle Length
    1-1/2" Boron
    Chain
    Sash Chain
    Function
    Non-Removable Key
    Cylinder Type
    Standard SFIC
    Number of Pins
    Not Included
    Cylinder Type Finish
    Satin Brass
    Keying
    Keyed Alike
    Custom Marking
    Not Included
    Number of Key
    Not Included
  • 6421 LF CN NR WCS6 26D KA LZ1 3KEY

    $29.03 37% Off

    Shackle Length
    1-1/2" Boron
    Chain
    Sash Chain
    Function
    Non-Removable Key
    Cylinder Type
    Lock Body Only
    Number of Pins
    6 Pins
    Cylinder Type Finish
    Satin Chrome
    Keying
    Keyed Alike
    Custom Marking
    Laser engraved in 1 area
    Number of Key
    3 keys per lock
  • 6421 LJ NR WCS6 NOKEY

    $22.78 37% Off

    Shackle Length
    2-1/2" Boron
    Chain
    Not Included
    Function
    Non-Removable Key
    Cylinder Type
    Lock Body Only
    Number of Pins
    6 Pins
    Cylinder Type Finish
    Not Included
    Keying
    Not Included
    Custom Marking
    Not Included
    Number of Key
    0 keys per lock
Showing 1 - 50 of 27015 items

Product Features

  • 2-1/8" (54mm) wide body
  • Boron Shackle
  • Shackle Dimensions:
    • Shackle Width: 5/16" (8mm)
    • Vertical Clearance: 1-1/8" (24mm)
    • Horizontal Clearance: 7/8" (22mm)
  • All orders must be in increments of 6