Four-claw nuts, also known as four-prong nuts, are specialized fastening components characterized by their unique four-clawed design. Unlike traditional nuts, these feature four outward-extending claws that grip and secure into pre-drilled holes, eliminating the need for threads and tools. This self-clinching mechanism allows for quick installation, vibration resistance, and reliable connections in sheet metal, plastic, or composite materials. Ideal for applications requiring frequent assembly or lightweight structures, four-claw nuts combine convenience with strong holding power.
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Standard
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Country/Region
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Description
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SAE J899
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USA
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Specifies requirements for self-clinching fasteners, applicable to four-claw nuts
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ISO 13918
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International
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Covers dimensions and performance of blind rivet nuts, related to clawed fasteners
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DIN 7982
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Germany
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Defines standards for press-in fasteners with similar clinching mechanisms
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GB/T 17880.3 - 1999
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China
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Details product specifications for self-clinching nuts used in sheet metal work
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JIS B 1179
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Japan
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Japanese standard for clinch nuts, including dimensional and strength ratings
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Grade
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Material
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Tensile Strength (MPa)
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Application Scenarios
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Mild Steel
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Low-carbon steel (e.g., Q235)
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370 - 500
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General-purpose sheet metal assembly, consumer electronics
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Stainless Steel
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304 / 316 stainless steel
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500 - 800
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Corrosion-resistant environments (marine, food processing)
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Aluminum Alloy
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6061-T6 aluminum
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276
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Lightweight structures in aerospace and automotive interiors
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Nylon
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Nylon 6/6
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-
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Insulation, non-conductive applications, and vibration dampening
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Brass
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C36000 brass
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345
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Decorative or low-corrosion settings (furniture, fixtures)
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Treatment Method
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Abbreviation
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Description
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Zinc Plating
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Zn
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Basic rust protection (clear, blue, or yellow finishes), suitable for indoor use
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Black Oxide Coating
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Black
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Creates a non-reflective surface with moderate rust resistance for internal components
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Passivation (Stainless Steel)
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-
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Improves corrosion resistance by forming a protective oxide layer on stainless steel nuts
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Anodizing (Aluminum)
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-
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Increases surface hardness and provides corrosion resistance, available in various colors
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Electroless Nickel Plating
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ENP
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Offers uniform, corrosion-resistant coating with good wear resistance
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