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50Pcs 5/16-18 Black Nylon Lock Nuts, 304 Stainless Steel Nylon Insert Locknuts, A2-70 Grade Hex Nylock Nuts, Black Oxide Coarse Thread for Automotive & Machinery

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$9.98

$ 4 .99 $4.99

In Stock

1.:1/2--13


2.Color:Black


About this item

  • 【Premium Anti-Loosening Performance】5/16"-18 standard coarse thread nylon insert locknuts provide reliable vibration resistance, ensuring a tight fit even under shock or movement. The nylon insert creates strong friction to prevent loosening, ideal for machinery, automotive, and industrial applications.
  • 【High-Quality 304 Stainless Steel】Made of durable 304 (A2-70) stainless steel, these lock nuts are rustproof, corrosion-resistant, and reusable. Precision-polished for a smooth surface, they won’t deform, twist, or scratch hands during installation.
  • 【Wide Industrial & DIY Applications】Perfect for furniture assembly, automotive repairs, machinery, construction, and workshop projects. Suitable for high-vibration environments, ensuring long-term stability for equipment and structures.
  • 【Convenient Storage & Easy to Use】Includes 50 pcs of 5/16"-18 locknuts in a well-organized package. Easy to install with standard wrenches, offering strong tightening force for secure fastening.
  • 【Durable & Long-Lasting Fastening Solution】Engineered for repeated use, these lock nuts maintain their grip and structural integrity even after multiple installations. The high-grade 304 stainless steel ensures long-term durability, while the nylon insert stays effective through vibration and wear, providing a cost-effective, reusable fastening solution for professional and DIY projects.



Product Description

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Ben Tanko
Reviewed in the United States on June 8, 2025
I like these because they are made with well defined threads and the ones I've used so far have had no issues starting on the bolts. I see no reason to avoid placing an order. I am happy with mine.
Tom
Reviewed in the United States on June 30, 2025
When I started using these nylon lock nuts, I was mainly looking for something that wouldn’t loosen up easily with vibration or movement. The lock nuts held tight better than I expected, thanks to the nylon insert that adds friction. They worked well on a few automotive and DIY home projects where secure fastening is key.The stainless steel finish kept everything rust-free and smooth during installation, which made handling them easier. However, they can feel a bit stiff at first, so you’ll want to take your time threading them on. Overall, they’ve proven to be reliable and reusable in my experience.If you need a solid lock nut that resists loosening and won’t rust, these are worth grabbing. They’re great for any project that deals with vibration or frequent use.
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