Trimax swing-away trailer lock TH6 5/8" x 6-1/8" — forged-steel, 7-pin high-security, weatherproof

The TRIMAX TH6 is a heavy-duty 5/8" x 6-1/8" swing-away trailer lock that combines a patented quarter-turn mechanism, a forged-steel body, and weatherproofing to secure swing-away trailers, boats, RVs and tow-behind equipment.

Built to stop theft and prevent accidental unlocks, the TRIMAX TH6 is engineered for harsh use and simple operation. Its double-headed locking pin fits swing-away receivers, while a 7-pin high-security keyway and a solid forged-steel body provide substantial resistance to forced entry. Weatherproof finishes and seals protect internal components so the lock stays reliable on the road or in storage.

How does the TH6 prevent accidental or false locking?

The lock uses TRIMAX’s patented 1/4-turn quarter-turn mechanism, which gives a clear positive engagement every time. Unlike some locks where you must guess whether it latched, the quarter-turn design eliminates uncertainty and reduces user error.

• Patented 1/4-turn locking technology for unmistakable engagement
• Positive mechanical stop to show full lock engagement
• Reduces time and frustration when securing a trailer

What makes the TH6 durable and resistant to tampering?

Durability comes from a 100% solid forged-steel body and a hardened steel pin; the lock has been rated in tests to withstand very high pull forces. Security is further bolstered by a 7-pin, spring-loaded Type A high-security key that resists common picking and drilling techniques.

• Solid forged-steel construction for high tensile strength
• Hardened 5/8" diameter double-headed pin with 6-1/8" span
• 7-pin Type A high-security keyway to deter picking and drilling

How does the TH6 stand up to weather and road grime?

The TH6 is finished with a triple-plated chrome layer on the hardened steel pin and includes an O-ring seal to keep water and debris out of the mechanism. A rubber keyhole cap adds an extra barrier against moisture and dirt, extending the lock’s service life in wet or salty environments.

• Triple-plated chrome finish for corrosion resistance
• O-ring seal to prevent water and road debris ingress
• Protective rubber keyhole cap for added weather protection

What trailers and equipment are compatible with this lock?

The TH6 is tailored for swing-away hitches and tow-behind equipment that use a double-headed locking pin configuration. It fits receivers requiring a 5/8" diameter pin with a 6-1/8" span, making it suitable for many trailers, RVs, boats, campers and other transportable gear.

• Designed for swing-away trailer receivers and dog-bone style pins
• Compatible with a wide range of boats, campers, RVs and utility trailers
• Works in transport and long-term storage scenarios

Who is this for: The TRIMAX TH6 is aimed at vehicle owners, fleet managers, and outdoor enthusiasts who need a dependable, easy-to-use security solution for swing-away trailer setups. If you tow boats, campers, ATVs or carry valuable equipment behind your vehicle and you want a lock that signals full engagement, resists physical attack, and endures outdoor conditions, the TH6 is engineered to meet those needs.