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Kep Nut Manufacturers, Suppliers, Importers, Dealers in Mumbai India

SS/MS Kep Nut, also known as a K-nut or K-lock nut, is a type of fastener with an attached free-spinning washer. Here are the details about SS/MS Kep Nut:


  • Stainless Steel (SS): Offers excellent corrosion resistance and durability, suitable for outdoor or corrosive environments.
  • Mild Steel (MS): Provides strength and cost-effectiveness, commonly used in indoor applications or where corrosion resistance is not the primary concern.


  • Hexagonal Nut: The main body of the Kep Nut is a standard hexagonal nut, which allows it to be tightened using a wrench or socket tool.
  • Free-Spinning Washer: Attached to the bottom of the nut is a washer that can spin freely. This washer is typically serrated or toothed to provide grip against the mating surface when the nut is tightened.
  • Internal Threads: The nut has internal threads that allow it to be screwed onto a mating bolt or threaded rod.


  • The Kep Nut is installed by threading it onto a bolt or threaded rod.
  • The free-spinning washer helps prevent the nut from loosening due to vibrations or torque, as it resists turning during tightening.


  • Available in various sizes to accommodate different bolt or screw diameters and material thicknesses.
  • Common thread sizes include metric and standard (imperial) measurements.


  • Widely used in industries such as automotive, aerospace, construction, and manufacturing, where a secure and reliable fastening solution is required.
  • Suitable for applications where vibration resistance is essential, such as machinery, engines, and equipment assemblies.
  • Used in assemblies where access to both sides of the workpiece is available for installation.


  • Provides a secure and reliable threaded connection.
  • The free-spinning washer helps prevent loosening due to vibration or torque, enhancing the stability of the assembly.
  • Versatile and can be used in various applications where standard hex nuts may loosen over time.


  • The free-spinning washer may increase the overall height of the nut, which can be a consideration in applications with space constraints.
  • Care must be taken during installation to ensure that the washer is properly seated against the mating surface to maximize its effectiveness in preventing loosening.