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Master Lock 389DAT Universal Coupler Lock for Trailers

Manufacturer

Master Lock

<h3>A Century of Security Innovation</h3><p>Since 1921, Master Lock has been synonymous with strength, durability, and uncompromising security. Founded by locksmith-inventor Harry Soref, the company revolutionized the industry with a padlock design that used laminated steel layers to economically produce an exceptionally strong lock body. Now a subsidiary of Fortune Brands Innovations, Master Lock Company LLC is headquartered in Oak Creek, Wisconsin, where it continues to develop security solutions trusted by millions around the world.</p><p>The brand gained widespread recognition through its famous 1974 Super Bowl commercial showing a blast from a high-powered rifle aimed at a padlock—though the bullet pierced the lock, it still functioned, cementing the "Tough Under Fire" slogan in the American consciousness. That commitment to legendary strength remains the foundation of every Master Lock product today.</p><h3>Comprehensive Security Solutions</h3><p>Master Lock's extensive product lineup serves diverse security needs across personal, automotive, commercial, and industrial applications. At the core of the brand's reputation are its <a href="/436-master-lock-locks-200628">locks</a>, which range from classic laminated padlocks and combination locks to cutting-edge Bluetooth-enabled and biometric models. The company added the combination lock to its portfolio in 1935, a model still sold today, and launched Bluetooth-enabled padlocks in 2015, demonstrating Master Lock's ability to honor tradition while embracing innovation.</p><p>Beyond traditional security, Master Lock has expanded into automotive and cargo control solutions. Their <a href="/436-master-lock-tie-strap-and-clip-10142">tie straps and clips</a> help secure loads in truck beds, trailers, and roof racks, featuring innovations like the StrapTrap system that manages excess webbing. For vehicle security, Master Lock offers specialized products including <a href="/436-master-lock-spare-tire-hoist-20541">spare tire hoists</a> and spare tire locks for automobiles, protecting vulnerable external-mounted tires from theft.</p><h3>Built to Last</h3><p>What sets Master Lock apart is not just product innovation but enduring quality. Customer testimonials speak of locks protecting spare tires during 8,300-mile trips to Alaska and combination locks working flawlessly after 64+ years of service with exposure to the elements. This extraordinary longevity stems from Master Lock's commitment to rigorous testing and premium materials, whether it's high-security shackles on padlocks or UV-treated polyester webbing on cargo straps.</p><p>Whether you're securing a storage unit, protecting tools at a job site, locking down cargo, or safeguarding your vehicle's spare tire, Master Lock delivers the authentic, time-tested security that has made it a household name for over a century. When protection matters, professionals and homeowners alike turn to the brand that literally proved it's tough under fire.</p>

Part Number

389DAT
06/03/2036 7:34 AM
Sale Price

$28.02

In Stock (10+)

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Usually delivered within 2 days

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No Hassle Returns

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Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Master Lock 389DAT Universal Coupler Lock provides heavy-duty theft protection for trailers, boats, and RVs. This versatile security device features a universal design that fits three common coupler sizes: 1-7/8 inch, 2 inch, and 2-5/16 inch couplers, making it compatible with most standard trailers.

Key Features:

  • Universal fit for 1-7/8", 2", and 2-5/16" couplers
  • Durable steel construction with weather-resistant finish
  • High-visibility red powder coat finish deters theft
  • Hardened steel lock mechanism resists cutting and sawing
  • Easy to install and remove when authorized
  • Prevents unauthorized hitching and trailer theft

This coupler lock works by blocking access to the coupler mechanism, preventing a hitch ball from being inserted. The bright red finish serves as a visible deterrent to potential thieves while protecting your investment when parked or stored. Ideal for utility trailers, boat trailers, campers, and equipment trailers.

quick and easy

When deducting the shipping discount, your site does not display the lowered shipping cost until later in the check-out procedure.

Good price and easy check out

Fast service!

We'll see.

great price, 1/2 the price of auto zone.

Great price and nice shipping discount coupon

easy and quick

Best prices I could find online. Thank you

Ordering it was easy. Delivery was completed on the 27th which seemed to take an awful long time to receive the part after ordering

Lowest price for my engine bolt set, beat Jeg's and Summit by quite a bit! I will definitely be checking Autoplicity for future needs.

Very fast, simple, and easy

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