Can you Determine The Correct Replacement Key For a Master Lock Coupler Lock Without Having The Key?

Updated 05/17/2023 | Published 05/16/2023

Question:

I have a master lock, coupler lock, model 377. There is also a number D457113. I have lost the keys and need replacement. Do you sell these replacement keys?

asked by: Matt S

Expert Reply:

With the Master Lock 1-7/8", 2", and 2-5/16" Trailer Coupler Lock # ML377KA we do not carry replacement keys and the only way to know the correct replacement key is off the key number included with the lock. This information is not stamped anywhere on the lock itself. You will have to have a locksmith remove the lock if it is attached to your trailer still and they may be able to get you a new key but you may have to get a new lock if they are unable to create a key for you.

expert reply by: Bud M