Coupler & Receiver Locks

Keyed Alike Systems

Trimax Coupler Locks

Receiver Locks

Trailer Locks

Difference Between a Receiver Lock and a Coupler Lock?

Receiver: A receiver pin is used to secure the receptacle part of a trailer hitch (attached to a vehicle) to inserts such as ball mounts, drawbars, accessory carriers or ornamental receiver plugs. The most common receiver pins are 1/2" and 5/8" in diameter. Class II receiver hitches have 1 1/4" receptacles and use 1/2" pins. Class III, IV and V receiver hitches have 2" receptacles and use 5/8" pins.

Coupler: A coupler is the forward most part of a trailer tongue that envelopes and secures to the tow vehicle hitch ball. The lever on the coupler both allows the ball to be received into the coupler and prevents the ball from being removed. Accordingly, a coupler lever lock prevents the lever from moving into the open position. For maximum security when a trailer, boat or RV is not hooked up to a vehicle, a coupler lever lock should be combined with an unattended trailer lock such as the UMAX 100 (SKU #1010) or UMAX 50 (SKU #1020).