3/8″ USS Flat Washer
Complete your sliding door safety assembly with the heavy-duty 3/8″ USS Flat Washer. Designed to slide perfectly onto our 3/8″ x 3-1/2″ hex head bolt and securely fasten with a matching 3/8″ lock nut, this washer is an essential piece of the puzzle. When combined, these three components act as a reliable door stopper, keeping your Premium track trolleys and horse stall doors from sliding off the edge of the track.
Compatibility: 3/8″ x 3-1/2″ Hex Head Bolt & 3/8″ Locknut
Proudly Made in the USA. No imported horse stalls—just American craftsmanship you can trust.
Every piece of hardware matters when it comes to the safety of your equestrian facility. The 3/8″ USS flat washer is a small but critical component designed specifically to finalize the stopper assembly on your overhead sliding door tracks.
Key Features & Benefits
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Perfect Fit: Manufactured to exact 3/8″ USS standards for a snug, rattle-free fit on your hardware assembly.
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Critical Safety Component: Distributes the load of the lock nut, ensuring the door stopper bolt remains tight and secure against impact.
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System Compatibility: Designed for seamless use with the RAMM 8′ Premium track system.
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Durable Build: Crafted from heavy-duty metal to withstand the daily bumps and stops of heavy sliding stall doors.
Quantity: Sold Individually
Finish: Hot-Dip Galvanized
Compatibility: 3/8″ x 3-1/2″ Hex Head Bolt & 3/8″ Lock Nut
Shipping: This item ships via USPS or a ground delivery service.
Installation: On the end opposite of the latch, slide the 3/8″ trolley stop washer onto the 3/8” x 3-1/2” hex head bolt, then feed the bolt up from the bottom opening in the track and through the hole in the top of the track. Fasten your hex bolt with the 3/8″ trolley stop lock nut. After your bolt is in place, you can snap in your Premium track end caps to help keep the dirt out of your track system.
Below are links to PDFs of the installation instructions for all of the compatible horse stalls, which you can save and print for referencing:
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