Discover Master Lock 378DAT adjustable coupler lock for 2-5/16in trailer couplers. Bright yellow finish enhances visibility and theft deterrence.
102 in stock
102 in stock
The Master Lock 378DAT trailer coupler lock is designed specifically for 2-5/16in trailer couplers and features an adjustable locking mechanism for a secure fit. Its bright yellow finish creates a highly visible theft deterrent while helping users quickly identify the lock during hookup and storage. || Built for utility, cargo, boat, and equipment trailers, the lock uses durable metal construction to help resist tampering and unauthorized trailer connection. The adjustable design simplifies installation across compatible coupler styles. || The weather-resistant finish supports outdoor use while maintaining visibility in storage yards, driveways, and job sites. For trailer owners seeking dedicated protection for larger couplers, the 378DAT offers a practical and highly visible security solution backed by Master Lock quality.
| Brand | Master Lock |
|---|---|
| Model | 378DAT |
| MPN | 378DAT |
| Product Type | Trailer Coupler Lock |
| Material | Steel Alloy |
| Finish Color | Yellow |
| Dimensions | Not Published |
| Weight (lb) | Not Published |
| Load Capacity | Not Published |
| Drawer Count | Not Published |
| Drawer Type | Not Published |
| Lock Type | Keyed lock |
| Mount Type | Trailer Coupler |
| Installation | Adjustable Locking |
| Compatibility | 2-5/16in couplers |
| Use Case | Trailer security |
| Warranty | Limited lifetime |
| Country of Origin | Not Published |
| Series | Trailer Security |
| UPC | 71649213236 |
Deliver in 3-5 business days
30 days return policy
Secure Payment at checkout
We are always here.
© 2026 Sports and Wheels
Reviews
There are no reviews yet.