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Big Red Locks


The Heavy Duty Cargo Door Lock secures both doors of all semi-trailers and sea containers by locking the inner-most vertical locking bars together. This lock is ideal for both the construction industry and the transportation industry. It is perfect for containers left on job sites, because it is easy to install and requires no mounting.

  • Recommended for construction site storage and over-the-road trucks
  • Adjustable to fit the door’s vertical bars from 9 ¾”-16” apart
  • An extension is available for the Heavy Duty Cargo Door Lock for odd-size container bars 17-23” apart.
  • Easy to install, no mounting required
  • Built with 2” and 2 ½” square tube steel with 3/16” thick walls
  • End plates are 3/16” plate steel 6” tall
  • Powder coat finish

Available with either the high security barrel style keyed lock (comes with 2 keys) or with a built-in changeable combination padlock

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