M2–M16 304 Stainless Steel Black Hex Nylon Insert Lock Nut (Self-Locking Locknut)

Compact, corrosion-resistant self-locking hex nuts designed for reliable vibration-proof fastening. These nylon insert lock nuts (nyloc nuts) combine 304 stainless steel strength with a durable black finish to deliver long-lasting performance for automotive, machinery, electronics, and DIY projects.

Key features

• Sizes: M2, M2.5, M3, M3.5, M4, M5, M6, M8, M10, M12, M14, M16
• Material: 304 stainless steel for corrosion resistance and strength
• Locking element: Nylon insert (self-locking) prevents loosening under vibration
• Head style: Hex (6-sided) for standard wrench/sockets
• Finish: Durable black coating for aesthetics and extra surface protection
• Type: Reusable lock nut (locking efficiency decreases with repeated use)

Benefits

• Prevents fastener backing out in high-vibration environments
• 304 stainless resists rust and corrosion for indoor/outdoor use
• Easy to install with standard hand tools or sockets
• Compact hex shape for strong torque transfer and fast installation
• Wide size range covers electronics to structural applications

Applications

• Automotive assemblies and motorcycle components
• Industrial machinery and equipment
• Electronics enclosures and printed circuit fastenings
• Construction, furniture, and appliance repair
• DIY projects, model building, and robotics

Specifications (summary)

• Thread form: Metric (M2–M16)
• Locking mechanism: Nylon insert, self-locking
• Material: Stainless Steel 304 (+ black finish)
• Head type: Hexagon
• Reuse guidance: Can be reused a few times; replace when locking resistance drops

Installation & care tips

• Tighten by hand until nylon engages, then finish with a wrench — avoid over-torqueing.
• Not recommended for continuous exposure above ~120°C (nylon insert will degrade at high temperatures).
• Replace lock nuts that show signs of wear, stripped threads, or reduced locking action.
• For marine or harsh chemical environments, consider stainless grades and finishes suited to those conditions.

Why choose these nylon insert lock nuts?

Durable, easy to use, and vibration-resistant — these M2–M16 304 stainless steel black hex nylon insert lock nuts offer dependable locking performance across a broad range of applications. If you need corrosion resistance plus a secure, low-profile fastening solution, these self-locking locknuts are an excellent choice.

Keywords: nylon insert lock nut, 304 stainless steel locknut, self-locking locknut, black hex nut, M2 M3 M4 M5 M6 M8 M10 M12 M14 M16.