K-caps, also known as K-nuts or keyhole nuts, are specialized fastening components designed for quick and tool-free installation. Characterized by their distinctive keyhole-shaped slots, these caps slide onto studs or bolts, and then rotate to lock in place, creating a secure connection. The unique slot design allows for easy adjustment and removal, making them ideal for applications that require frequent assembly and disassembly, such as furniture, display fixtures, and light machinery. K-caps combine convenience with reliable holding power, providing a practical solution for temporary or semi-permanent connections.
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Standard
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Country/Region
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Description
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Custom - Industry Specific
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-
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As K-caps often serve niche purposes, many manufacturers follow internal design guidelines
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ISO 13918 (Related)
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International
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Indirectly relevant as it covers self-clinching fasteners, sharing similar installation concepts
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DIN 7982 (Related)
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Germany
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Offers insights into press-in fasteners, which can be compared to K-caps' locking mechanism
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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 furniture assembly, DIY projects
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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 (kitchen appliances, outdoor displays)
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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 exhibition booths or signage
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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 noise reduction
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Zinc Alloy
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Zamak 3
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320
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Decorative or low-load applications with good casting properties
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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 K-caps
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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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Powder Coating
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-
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Offers durable, colored finishes for aesthetic customization and enhanced wear resistance
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