Description
You know how regular nuts have a habit of working loose when your equipment’s bouncing around the field or vibrating during long days of work? That’s where a nylon lock nut earns its keep. This 3/8-inch lock nut has a built-in nylon insert that grips the threads tight, keeping your bolted connections secure even when your machinery’s putting in serious hours. Whether you’re fixing a loose bolt on a cultivator frame or securing hydraulic fittings, this little nut prevents the headaches that come with fasteners backing out on their own.
What You’re Getting
- Built-in nylon insert that creates friction to prevent loosening under vibration
- Zinc plating protects against rust and corrosion in outdoor conditions
- Grade 2 strength rating suitable for most agricultural applications
- UNF fine thread provides stronger holding power than coarse threads
- Standard 3/8-inch size fits common bolts and studs on farm equipment
Built for Real Farm Work
Agricultural machinery and equipment subject to constant vibration require reliable fastening solutions that maintain secure connections throughout demanding operations. These nyloc nuts are essential for securing implement attachments, hydraulic components, PTO assemblies, and structural connections on tractors, combines, and farming equipment. The 3/8-inch size is perfect for mid-range applications where you need more holding power than smaller fasteners but don’t need the bulk of larger nuts.
Made to Last
The zinc plating extends service life by protecting against rust and corrosion, while the fine UNF thread provides stronger holding power than coarse threads in critical applications. This design prevents the gradual loosening that occurs with standard nuts in high-vibration environments, reducing maintenance requirements and preventing unexpected failures.
Installation Notes
Thread it on just like a regular nut, but you’ll feel the nylon insert engage as you get close to snug. Follow your normal torque specs for the bolt grade and size. The nylon insert provides resistance during threading, which is normal operation. Avoid over-tightening, which can damage the nylon insert and reduce locking effectiveness.


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