SKU: SMA-120-84618 1-1/8 Inch Nylon Lock Nut with Zinc Plating for Heavy-Duty Agricultural Equipment

When you're dealing with heavy equipment that shakes, rattles, and vibrates all day long, a regular nut just won't cut it. This 1-1/8 inch nylon lock nut stays put when the going gets rough, whether you're running a rotary cutter through thick brush or bouncing across rough fields. The nylon insert grabs onto those fine UNF threads and won't let go, keeping your connections tight when it matters most.

What You're Getting

• Nylon insert that locks onto threads to prevent loosening from vibration and shock
• Zinc plating that fights off rust and corrosion from weather and field conditions
• UNF fine thread pitch that provides stronger holding power than coarse threads
• Grade 2 construction that handles the demands of agricultural work
• Direct replacement for OEM nuts—no modifications needed

Built for Real Farm Work

This heavy-duty nut is commonly used on rotary cutter blade bolts, PTO assemblies, and other high-vibration applications where equipment failure isn't an option. It's the same size used in blade bolt kits for Tiger cutters and other commercial mowing equipment. When you're cutting brush or maintaining pastures, this nut keeps your blades secure so you can focus on getting the job done.

Made to Last

The zinc coating protects against the elements while the nylon insert maintains its grip through countless cycles of tightening and removal. This design prevents the gradual loosening that occurs with standard nuts in high-vibration environments, reducing maintenance requirements and preventing unexpected failures. The fine UNF thread provides stronger holding power than coarse threads in critical applications.

Installation Notes

You'll feel resistance when threading this nut on—that's the nylon insert doing its job. Use standard torque specifications for 1-1/8 inch fasteners, and don't over-tighten since that can damage the nylon insert. The nut can be removed and reused several times before the insert wears out, making maintenance easier when you need to change blades or service equipment.