Replacement Key Availability for Masterlock Coupler Lock 379DAT

Updated 05/05/2025 | Published 09/28/2016

Products Featured in This Question

Master Lock Universal Trailer Coupler Lock

(48)

$33.11

Replacement Key for MasterLock Coupler Locks

(21)

$14.44

Question:

Can I get a replacement key for a trailer tongue lock...379 atpy.. I have misplaced my key and I did not write down number off of key. Any info is appreciated.

asked by: Chuck P

Expert Reply:

For your trailer tongue lock part # 379DAT the correct part number for a replacement key is the part # MLK1. But you will need to know what key number you need. If you do not know what key number is needed there is no way to know.

expert reply by: Jameson C

Carlton P.

5/1/2025

How many key numbers are there? I am in the same situation. Is there a master key?

Jameson C.

5/5/2025

@CarltonP There's a couple hundred different key numbers and no there isn't a master key. If you don't have the key number written down it's going to be best to replace the padlock.