Heavy Duty Cargo Door Lock


Keying Options * 

Select a keying option

Extension Kit * 

Select an extension kit

Extra Keys

Two keys are included with each lock free of charge. Additional keys can be added for $6.95 each and the quantity selected will be applied to the amount of locks ordered.


The Heavy Duty Cargo Door Lock is our number one selling device, built to secure semi-trailers and sea containers by locking the innermost vertical locking bars together. This durable lock is easy to install and requires no mounting, making it the ideal accessory for construction sites and over-the-road trucks.


Additional information

Weight 13 lbs
Dimensions 10 × 7 × 5 in
Standard vs. Heavy Duty



Hardened steel
Built with 2” and 2 ½” square tube steel with 3/16” thick walls

Finish type

Powder coat


Fits vertical cargo door bars from 9 ¾”-16” apart
For container bars 17-23” apart, an extension kit is available to add-on
End plates are 3/16” thick and 6” tall

Part number

Keyed unit: HDCDL
Combo unit: HDCDL-C

View Installation Instructions

View Extension Directions

Keyed Differently
For more controlled access to your equipment, no code is kept on file with our keyed differently option. Each key is made unique to the individual lock.

Keyed Alike
With our exclusive keyed-alike option, your key code is kept on file, allowing future locks to be accessed with a single key.

If you already have a key code on file that you wish to match, select “keyed alike” and enter your assigned key code at checkout.

Combination Lock
Four-digit combination locks are ideal for multiple users who need to unlock containers or equipment without several sets of keys circulating or getting lost.

Keyed vs. Combination