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Trimax Unattended Trailer Coupler Lock

Tri max receiver hitch pin locks, bicycle locks, trailer, rv, marine padlocks cables and more.
UMAX on Coupler
7 Images
UMAX100
UMAX100 Packaging
UMAX50
UMAX50 w/ Keys
Lock w/ Optional Cable
UMAX in Use
UMAX on Coupler
UMAX100UMAX100 PackagingUMAX50UMAX50 w/ KeysLock w/ Optional CableUMAX in UseUMAX on Coupler
  • Fits Many Couplers
  • Available in 2 Models
  • Secures Trailered Vehicle
  • Limited Lifetime Warranty
  • Easy Installation
More Features
$60.89$78.74
$52.49
12%
Trimax universal dual purpose coupler locks fit all couplers from 1 7/8", 2", to 2 5/16", all coupler types. Available in 2 models. UMAX100 which features 360 degrees of Solid Hardened Steel and UMAX50 which is made of Die Cast rugged corrosion resistant finish. Both provide instant security for your camper, boat or trailer when they are not hooked up to your vehicle. Features 1/2 turn technology that cannot be false locked. Easy Installation. Slide ball up into coupler and replace u-shackle. One size fits all (from 1 7/8", 2", to 2 5/16", all coupler types). Featuring hey hole cover that slides up to seal out dirt and grime. An attractive ballistic grade nylon housing absorbs hammer blows and protects against weather. Plus a Type A key which is a spring loaded, 7 pin, high security key. Resists attempted drill outs. Rugged and durable, the key will not bend or break.
  • Fits Many Couplers: Trimax universal dual purpose coupler locks fit all couplers from 1 7/8", 2", to 2 5/16", all coupler types. 
  • Available in 2 Models: UMAX100 which features 360 degrees of Solid Hardened Steel and UMAX50 which is made of Die Cast rugged corrosion resistant finish. 
  • Secures Trailered Vehicle: Provide instant security for your camper, boat or trailer when they are not hooked up to your vehicle.
  • Limited Lifetime Warranty:
  • Easy Installation: Slide ball up into coupler and replace u-shackle. 
  • 1/2 turn technology that cannot be false locked.
  • Key hole cover that slides up to seal out dirt and grime.  
  • Huge 6 tooth, 3/8" dual ratchet locking system
  • Attractive ballistic grade nylon housing absorbs hammer blows and protects against weather. 
  • Type A key which is a spring loaded, 7 pin, high security key. Resists attempted drill outs.  Rugged and durable, the key will not bend or break.
  • For dual force security add a TRIMAX chain or cable secured to an anchor point!  Also, add a TRIMAX coupler lever lock for additional protection.
Trimax Unattended Trailer Lock
UMAX in Use UMAX in Use
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.
Lock w/ Optional Cable Lock w/ Optional Cable
For dual force security add a TRIMAX chain or cable secured to an anchor point! Also, add a TRIMAX coupler lever lock for additional protection.
UMAX100 UMAX100
UMAX100 which features 360 degrees of Solid Hardened Steel. Trimax universal dual purpose coupler locks fit all couplers from 1 7/8", 2", to 2 5/16", all coupler types.
UMAX50 UMAX50
UMAX50 which is made of Die Cast rugged corrosion resistant. Trimax universal dual purpose coupler locks fit all couplers from 1 7/8", 2", to 2 5/16", all coupler types.
Fits all of the following couplers and more...

1 7/8" or 2" Fulton
Atwood 2"
UFP
Bulldog
2 5/16" couplers
Fulton Heavy Duty
Surge Brake (Reverse Mount)
  • One size fits all (from 1 7/8", 2", to 2 5/16", all coupler types)
  • Key hole cover slides up to seal out dirt and grime
  • Attractive ballistic grade nylon housing absorbs hammer blows and protects against weather
  • Type A key which is a spring loaded, 7 pin, high security key. Resists attempted drill outs. Rugged and durable, the key will not bend or break.
Specifications:
  • LIFETIME WARRANTY
  • Weighs 6 pounds
  • Huge 6 tooth, 3/8" dual ratchet locking system
  • Hardened 5/8" 16mm steel shackle
Trimax Locks for receiver hitches, trailers, rv, bikes and more.
View all Trimax products

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