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Automotive > Exterior Accessories > Trailer Accessories > Hardware > Coupler Parts > B004A5LCMQ
  1. Master Lock 3784DAT Heavy Duty Trailer Coupler Lock
    Image(s) provided for illustrative purposes and may differ from the actual product
  2. Master Lock 3784DAT Heavy Duty Trailer Coupler Lock

    Delivery: 10-20 Working Days
    Customer Ratings (31 USA reviews)
    Price R1470.00

Product Description

  • Heavy duty trailer coupler lock fits 2-5/16 inch couplers
  • Laminated steel construction
  • Advanced locking mechanism resists against picking and prying
  • Keyway cover protects lock from moisture and dirt
  • Keyed alike stainless steel adjustable trailer coupler latch lock is included with the coupler lock
Additional Information

Protect your trailer from tow away theft with this coupler lock set from Master Lock. This heavy duty trailer coupler lock fits 2-5/16 inch standard lip, rolled lip, straight lip, surge brake, hammer blow and UFP coupler styles. Laminated steel construction protects against physical attacks while an advanced locking mechanism resists picking and prying. A stainless steel coupler latch lock is keyed alike with the coupler lock for added security and convenience. The latch lock adjusts from 9/16 inch to 2-3/4 inch for application versatility. A keyway cover protects both lock cylinders from moisture and dirt.


Master Lock
Master Lock
Master Lock
Master Lock
Master Lock
Limited Warranty
Please Note

The authorised South African distributor of this product is under no obligation to honour the manufacture's guarantees/warranties or to provide after-sales service.

Please note that this product is based in the USA, and is designed and labelled to be used in the USA. In addition, if the unit is powered it will come with a US plug and an adapter/transformer may be required. Please click here for more information on power requirements, or check with us if you are unsure or need any assistance!

Please also note that certain items cannot be imported, these include Alcohol, Agricultural Remedies, Animals, Batteries, Flammable Materials, Farm Feeds, Currency, Food, Furs, Chemicals, Explosives, Medications, Plants, Poinsons, Seeds, Supplements, Nutrients, Pressurized Cans, Tactical Equipment, Vitamins, Weaponry and Weaponry Accessories. In these cases, information displayed above is for reference/informational purposes only and the item will not be imported. All content is generated and displayed from an automated USA product feed, and if the item cannot be imported for any reason, including carrier restrictions and/or import or sales restrictions under South African or American law, we do reserve the right to cancel and refund the order in full. If you are not sure if we are permitted to bring in an item, please send us an e-mail with a link to the item to confirm.

Please also ensure that you are ordering the correct item for your particular application as returns to the USA are costly. Product reviews are also provided for most of our items, which can give you a good idea for possible things to look out for and the quality of the item. By clicking Add to Cart, you are confirming that the item is correct and you accept the conditions listed here.