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Home > Towing > Trimax Coupler Locks > TC3 Deluxe 3 1/2" Span Chrome Coupler Lock

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TC3 Deluxe 3 1/2" Span Chrome Coupler Lock

The TC3 features a triple plated chrome finish. Provides additional security for your camper, boat or trailer by securing the coupler on your trailer tongue. Also secures trailer door latches, cargo boxes and other types of doors. Features patented 1/4 turn technology that cannot be false locked.

Provides dual force protection when used with the UMAX100

  • Fits couplers with up to a 3 1/2" span
  • O ring keeps water, grime and dirt out of locking mechanism to ensure years of use
  • Protective rubber cap protects keyhole from water, grime and dirt
  • Type A key which is spring loaded, 7 pin, high security key. Resists attempted drill outs. Rugged and durable, the key will not bend or break.


  • Patented dual lock lug design
  • Full length pin made of solid forged machined steel that cannot be pulled out
  • No internal springs to seize up or brake
  • Triple plated chrome finish
  • Knurling on lock heads adds style and grip
  • Stainless steel internal components
  • Double headed or dog bone style design
  • Width between heads (exposed pin length or gap space) is 7/8"
  • 1/4" pin diameter

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).

TRIMAX makes the worlds toughest locks. Through value added engineering design, TRIMAX is committed to product innovation that holds up to the highest quality standards. TRIMAX provides maximum security for marine, trailer and tow, RV, performance truck, power sports and bicycle applications. Tested. Tough. TRIMAX.

TRIMAX offers a lifetime warranty on all of their products.

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