STRONG. TOUGH. SIMPLE. The DeadBolt / CT Johnson Blockhead Trailer Coupler Lock is designed with high-tech materials that redefine the traditional lip engaging coupler lock. The heavy-wall cast aircraft aluminum body provides superior strength-to-weight ratio, a distinctive look, and great value.
• Simple, quarter turn lock mechanism
• Fits flat lip style 1-7/8″ and 2″ couplers
• Durable, exterior-grade powder-coat finish
• Double-sided automotive style key for easy insertion and removal
NOTE: Fits 1-7/8″ and 2″ lip-engaging, trigger-style couplers. Coupler should have flat lip around the bottom. Maximum lip width: 3-3/4″.
Before You Order
Measure the coupler size and check that it is a lip-engaging trigger style with a flat lip around the bottom; this model fits 1-7/8-inch and 2-inch couplers and allows a maximum 3-3/4-inch lip width.
Frequently Asked Questions
Which couplers does the TCL1-AS lock fit?
The source says it fits flat-lip, lip-engaging trigger-style 1-7/8-inch and 2-inch couplers.
What is the maximum coupler lip width?
The listed maximum lip width is 3-3/4 inches; measure the coupler lip before purchase.







