Exterior Components› Body Panels and Components

Master Lock

Coupler Lock: 1 7/8" & 2" couplers; keyed different

$55.93

SKU: M014 377DAT

In Stock
In Stock
Ships by Aug 5
Free Shipping over $100
Non-Returnable Item

Description

Coupler Lock: 1 7/8" & 2" couplers; keyed different

MIA's Description

The Master Lock 377DAT is a trailer coupler lock designed to fit multiple sizes, including 1-7/8 in, 2 in, and most 2-5/16 in couplers. It features an advanced locking mechanism that resists picking and prying.

This lock offers quick installation and removal, and its rust and corrosion-resistant construction makes it suitable for outdoor use. It is ideal for trailers, trucks, and towing applications, as well as marine and offshore security needs.

Fitment

Fitment Guaranteed

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on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandMaster Lock
Part NumberM014 377DAT

Videos

[1356] A Master Lock I Should FEAR?!? Model 377 Trailer Lock

[1356] A Master Lock I Should FEAR?!? Model 377 Trailer Lock
(1532) Master Lock Trailer Couplers (379ATPY & 389DAT) (JUNK!)

(1532) Master Lock Trailer Couplers (379ATPY & 389DAT) (JUNK!)
[809] TERRIBLE Master Lock Trailer Coupler Lock Picked (Model 377DAT)

[809] TERRIBLE Master Lock Trailer Coupler Lock Picked (Model 377DAT)
About Master Lock Push to Lock™ Receiver Locks

About Master Lock Push to Lock™ Receiver Locks
(1037) Master Lock 377 Trailer Hitch Lock (JUNK!)

(1037) Master Lock 377 Trailer Hitch Lock (JUNK!)
[941] Tow Smart Trailer Coupler Lock Bypassed FAST

[941] Tow Smart Trailer Coupler Lock Bypassed FAST
Lost key Master Lock 377DAT Coupler Lock Maxwell's World

Lost key Master Lock 377DAT Coupler Lock Maxwell's World
etrailer | The Low-Down on the Master Lock Universal Trailer Coupler Lock

etrailer | The Low-Down on the Master Lock Universal Trailer Coupler Lock
[377] Master Lock Model 2866 Trailer Hitch Pin Lock Picked

[377] Master Lock Model 2866 Trailer Hitch Pin Lock Picked
Two differnet types of Anti-Theft Trailer locks

Two differnet types of Anti-Theft Trailer locks

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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