Quick Summary
The Master Lock 379ATPY is a black trailer tongue lock for trailer couplers. It is described as a coupler lock for blocking unauthorized coupling on parked trailers and towing equipment.
The fit information given for this lock covers 1-7/8 in. (48 mm), 2 in. (51 mm), and most 2-5/16 in. (59 mm) trailer couplers. If you are choosing between offers, confirm your coupler size and whether you want this exact keyed lock version.
Key Details
| Detail | Product information and buyer relevance |
|---|---|
| Brand | Master Lock. Helps identify the exact product line. |
| Model | 379ATPY. Use this model number to match the exact lock. |
| Product type | Trailer tongue lock / trailer coupler lock. Intended for trailer coupling points. |
| Color | Black. Useful if color matters for matching or identification. |
| Compatible coupler sizes | 1-7/8 in. (48 mm), 2 in. (51 mm), and most 2-5/16 in. (59 mm) trailer couplers. Check your coupler size before buying. |
| Included items | One lock and two keys. Confirm the contents match the offer you choose. |
What to Compare Before Buying
- Coupler size: The stated fit covers 1-7/8 in., 2 in., and most 2-5/16 in. trailer couplers. Measure your coupler before choosing an offer.
- Lock format: This is a keyed trailer coupler lock. Make sure that is the style you want for your trailer setup.
- Included items: The described package includes one lock and two keys. Check that the selected offer matches that count.
- Model match: 379ATPY is the exact model number shown for this lock. Use it to avoid choosing a different version.
What Is Included
One trailer coupler lock and two keys.
Before You Decide
Confirm the 379ATPY model, your coupler size, and the included key count before choosing an offer. If your coupler does not match one of the stated sizes, select a different lock.
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