HNeekyr Trailer Tandem Slide Stopper Locking Pin — White Zinc 2.125" Flange, Tapered Shaft for Semi-Trailers

HNeekyr Trailer Tandem Slide Stopper is a heavy-duty locking pin designed to secure and position a semi-trailer tandem slide for safer load distribution and stable towing.

Built from robust steel with white zinc plating, the HNeekyr Tandem Slide Stopper provides a durable, corrosion-resistant solution for locking the sliding axle assembly on most semi-trailers. Its tapered shaft and 2.125-inch flange give a precise fit, and the simple insert-and-release installation means drivers can lock or unlock the tandem quickly while preparing loads or changing haul configurations.

How does the Tandem Slide Stopper secure my trailer during loading?

The locking pin engages the slide mechanism to hold the axle in the chosen position, preventing unwanted movement while you adjust cargo or hitch operations. This reduces shifting during loading and helps maintain trailer balance.

• Flange diameter: 2.125 inches for stable seating
• Shaft diameter tapers from 1.31 to 1.47 inches to match common slider holes
• White zinc finish resists rust during outdoor storage
• Single-piece steel construction for impact resistance

How do I install and remove the HNeekyr slide stopper?

Installation takes only a few steps: insert the pin into the slider hole, release the parking brake and slide the trailer until the dowel aligns, then release the handle so the pin drops into place. Removal reverses the steps—withdraw the pin once the slider is unlocked and the trailer secured.

• Insert tandem slider into the slider hole
• Release parking brake and move trailer until dowel contacts stop
• Release handle to lock dowel into the correct hole
• Withdraw pin and remove sliding baffle to unlock

Will this fit my semi-trailer’s slider assembly?

The HNeekyr Tandem Slide Stopper is sized to fit many standard slider systems, thanks to its tapered shaft that accommodates hole diameters from roughly 1.31 to 1.47 inches. Confirm your trailer’s slider hole dimensions and flange clearance to ensure compatibility.

• Flange clearance: 2.125 inches diameter
• Shaft taper: 1.31" to 1.47" (approx.)
• Overall height: 2.5 inches for proper engagement depth
• Designed for heavy-duty, commercial slider applications

What maintenance or care does the locking pin require?

Routine inspection and light cleaning are all that’s needed to keep the stop functioning reliably. The white zinc plating offers corrosion resistance, but periodic lubrication and removal of debris will extend service life.

• Wipe off dirt and road grime after use
• Apply light lubricant on the shaft to prevent sticking
• Inspect for wear or deformation before each trip
• Replace if threads or shaft show significant damage

Who this is for: Drivers, fleet managers, and owner-operators who need a straightforward, sturdy locking pin to fix tandem slide positions on semi-trailers will benefit from the HNeekyr Tandem Slide Stopper. It’s intended for commercial trucking environments where quick, reliable axle positioning helps improve load distribution and towing stability. Each package contains one Tandem Slide Stopper, making it suitable as a spare part or replacement item in maintenance kits.