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  5. Video 181173

A Closer Look at the Master Lock Trailer Coupler Lock Video

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Info for this part was:

Employee Jeff D
Installed by:
Jeff D
Employee Matthew B
Installed by:
Matthew B
Employee Dustin K
Video Edited:
Dustin K
Employee Matthew G
Video by:
Matthew G

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Products Featured in this Video


Master Lock 1-7/8", 2", and 2-5/16" Trailer Coupler Lock - Gray - Keyed Alike


Master Lock Trailer Tongue Lock

50 reviews


Code: ML377KA

Retail: $62.47

Price:  $44.34
  • Trailer Tongue Lock
  • Latch Lock
  • Keyed Alike
  • Steel
  • Fits 1-7/8 Inch Ball
  • Fits 2 Inch Ball
  • Fits 2-5/16 Inch Ball
  • Master Lock



Gray-coated die-cast zinc trailer coupler lock guards against trailer towaway theft. Fits most 1-7/8", 2", and 2-5/16" ball diameters. Comes keyed alike if ordering more than one lock.


Do you have a question about part ML377KA?more information >     


A Closer Look at the Master Lock Trailer Coupler Lock


Hi, Matt with etrailer. Today we're gonna be talking about Master Lock's Universal Coupler Lock. Now this is gonna be great because it's really easy to use and it's gonna keep your trailer more secure. Now the two things that stand out to me is that, one, it's gonna be really easy to put on here and that is gonna be universal. So right now I have it on a 2-5/16 coupler but this will work… see more >