DOUBLENUT®ADVANTAGE

Revolutionizing Hay Transport: The Patented Doublenut® Locking System from PRO-Link®INC

At PRO-Link®, we understand the unique demands that farmers and ranchers face every day. From the break of dawn to sundown, your equipment has to perform flawlessly, especially when you’re moving heavy, high-density hay bales. That’s why PRO-Link® engineered the Doublenut® Locking System—a patented, game-changing innovation built into our HAYSTIX® line of tapered hay bale spears. This system isn’t just an upgrade; it’s a revolution in secure spear mounting, delivering unmatched safety, stability, and longevity.

What Is the Doublenut® Locking System?

The Doublenut® Locking System is PRO-Link®’s patented solution for securely fastening hay bale spears into Their designated sleeves that have been welded onto hay frame attachments. Unlike traditional bale spear setups that rely on a single conical nut to hold the spear in place, the Doublenut® system uses two locking components:

• A precision-engineered conical nut that seats the spear tightly into the sleeve
• A jam nut that locks against the conical nut to prevent loosening from vibration or load stress

This two-nut configuration eliminates the #1 cause of spear failure: vibration-induced loosening. Whether you’re transporting round bales, large square bales, or multiple stacked bales, the Doublenut® system provides peace of mind and rock-solid performance.

The Problem with Standard Bale Spears

Most hay bale spears on the market use a single conical nut to secure the spear in place. While this method may seem sufficient at first glance, it leaves the spear vulnerable to gradual loosening under repeated use. Over time, vibration and torque from heavy bales can cause the nut to back off slightly, allowing the spear to shift, wobble, or even fall out. This doesn’t just lead to downtime—it can cause serious equipment damage or personal injury.

With standard setups, routine tightening becomes necessary maintenance. But that’s just a temporary fix. The real solution is a locking system that ensures the spear stays in place no matter what the job throws at it.

How the Doublenut® System Solves It

The genius idea of the Doublenut® system lies in its simplicity and strength. Once the conical nut draws the spear into place in the tapered sleeve, the jam nut follows up to lock it in position. The jam nut physically resists loosening due to torque, making the connection far more resilient under tough field conditions.

This system ensures that the spear stays firmly seated in the sleeve—no shifting, no wobbling, no retightening. It’s a one-time install that lasts season after season. When it’s time for spear replacement or repositioning, the process is just as simple.

Built Into Every HAYSTIX® Spear

PRO-Link’s Doublenut® system is standard on all of our HAYSTIX® hay bale spears. These spears are forged from high-strength, heat-treated steel and designed with a tapered profile to easily penetrate and release from both round and square hay bales.

Each HAYSTIX® bale spear comes threaded to accommodate the Doublenut® system and pairs perfectly with our PRO-Link® hay moving frames, including 3 Point, universal quick attach, and Euro mount frames. When paired with the Doublenut® system, these bale spears deliver maximum performance, minimal maintenance, and virtually no risk of loosening or hay fork failure.

Exclusively from PRO-Link

The Doublenut® Locking System is patented and exclusive to PRO-Link®. No other hay spear on the market offers this level of anti-vibration protection and spear security. Competing products still rely on single-nut setups, leaving you vulnerable to breakdowns when you need reliability the most.

We designed the Doublenut® system not just as an improvement—but as a complete fix for the most common and costly issue facing hay transport equipment.

Designed by Farmers, for Farmers

As a family-owned business with deep roots in agriculture, PRO-Link® designs every product with our customers in mind. The Doublenut® Locking System came from real-world experience and real-world challenges—and we solved them the right way.

When you’re out in the field, the last thing you want to worry about is whether your hay spear is going to hold. With the Doublenut® system, you don’t have to.

Why Choose PRO-Link’s HAYSTIX®?

• Patented Doublenut® Locking System for unmatched bale spear security
• Forged tapered steel bale spears built to last under rugged use
• Compatible with all major hay frames—Euro mount, 3-Point, and Quick Attach
• Made in the USA with a 1-year warranty against defects
• Trusted by farmers and ranchers across the country

Conclusion: Don’t Settle for a Single Nut

When it comes to hay spike technology, one nut is not enough. PRO-Link®’s patented Doublenut® Locking System delivers the highest standard in bale spear safety, reliability, and performance. Whether you’re feeding cattle, storing hay for winter, or transporting bales across the farm, this system keeps your equipment tight and your operation running smoothly.

Visit www.pro-link.us to browse our full line of HAYSTIX® hay bale spears and experience the power of the Doublenut® difference.