NBJINGYI Trailer Coupler — 2" Ball to 3" Channel Straight Coupler, 3,500 lb GTW, Zinc-Plated Steel

NBJINGYI's straight coupler secures a 2" hitch ball to a 3" trailer channel with a 3,500 lb rating for reliable mid-size towing.

This straight trailer coupler from NBJINGYI is built to attach standard 2" hitch balls to 3" wide trailer tongues, delivering a sturdy 3,500 lb gross trailer weight (GTW) capacity. Constructed from thick, die-cut steel and finished with zinc plating, it’s designed for frequent use on boat trailers, utility haulers, and equipment trailers where durability and a positive connection are essential. The coupler combines a spring-loaded quick-release latch, pre-drilled security holes, and a wide channel fit so you can match it to reinforced frames common on larger trailers.

How does the NBJINGYI coupler handle everyday towing tasks?

The coupler clamps cleanly onto a 2" hitch ball and holds up under common loads up to 3,500 lbs, making it suitable for mid-sized boats and utility gear. The quick-release latch speeds hookup and detachment without sacrificing a secure grip once latched.

• Rated GTW: 3,500 lbs for common mid-size trailers
• Spring-loaded latch for fast, dependable locking
• Thick die-cut steel core for consistent strength

Will this fit my trailer tongue and hitch ball?

This coupler is engineered specifically for a 2" diameter hitch ball and a 3" wide straight trailer channel. It is ideal for trailers with reinforced or wider tongues often used on boats and heavy-duty utility trailers.

• Ball size compatibility: standard 2" hitch ball
• Channel width: designed for 3" straight trailer tongues
• Mounting: fits common bolt patterns on reinforced frames

What safety and corrosion protections are included?

NBJINGYI includes pre-drilled holes sized for a safety pin or coupler lock so you can add a secondary restraint. A zinc-plated finish helps resist corrosion in wet conditions, extending the life of the coupler when exposed to water and road salt.

• Pre-drilled safety holes accept pins or locks (lock sold separately)
• Zinc plating for surface corrosion resistance
• Robust latch design reduces accidental uncoupling risk

How does installation and maintenance look?

Installation is straightforward on compatible 3" tongues, and maintenance requires only routine inspection and light lubrication of the latch. Tighten mounting hardware and check the latch spring and pin holes before long trips to maintain reliable performance.

• Simple bolt-on installation for matching channel widths
• Inspect latch spring and safety holes regularly
• Light oiling of moving parts prevents sticking and wear

Who is this for: The NBJINGYI 2" straight coupler is intended for trailer owners who tow mid-sized loads—such as small boats, personal watercraft trailers, and equipment haulers—who need a durable, quick-locking coupler that fits a wider 3" channel. It’s a practical upgrade for anyone replacing worn couplers on reinforced tongues or for builders assembling trailers that require a reliable 3,500 lb-rated attachment point. Note: always verify your trailer’s tongue width and hitch specifications before purchase and pair the coupler with an appropriately rated hitch ball, safety chains, and locking device as needed.