Lantern nuts, also referred to as acorn nuts with a hollow or open-top design resembling a lantern, are specialized fastening components that combine protection and aesthetics. Their unique structure features a domed cap with an open or partially open top, shielding the threaded end of a bolt from debris and environmental elements while allowing for easy inspection or adjustment of the connection. Widely used in automotive trim, furniture assembly, and decorative applications, lantern nuts offer both functional security and a polished appearance, making them ideal for scenarios where exposed threads need concealment without sacrificing accessibility.
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Standard
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Country/Region
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Description
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ISO 4034
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International
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General specifications for domed nuts, applicable to lantern nut variants
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DIN 1587
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Germany
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Defines dimensions and tolerances for domed nuts, covering lantern nut styles
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ASME B18.2.6
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USA
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Covers inch-series domed nuts, detailing thread and cap design requirements
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GB/T 923 - 2009
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China
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Details product standards for domed nuts, including lantern nut configurations
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JIS B 1181
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Japan
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Japanese standard specifying dimensions and strength ratings for lantern nuts
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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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4
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Low-carbon steel (e.g., Q235)
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400
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General household items, light-duty decorative fixtures
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5
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Low-carbon steel (e.g., Q235)
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500
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Common industrial equipment with aesthetic requirements
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8
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Medium-carbon steel (e.g., 45# steel)
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800
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Automotive exterior components, high-vibration settings
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A2-70 (Stainless Steel)
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304 stainless steel
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700
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Corrosion-resistant environments like indoor humid areas
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A4-80 (Stainless Steel)
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316 stainless steel
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800
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Marine applications, coastal infrastructure
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Aluminum Alloy
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6061-T6 aluminum
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276
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Lightweight decorative elements in aerospace interiors
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Brass
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C36000 brass
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345
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Ornamental fixtures, antique restorations
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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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Chrome Plating
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Cr
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Enhances appearance and provides moderate corrosion resistance for visible parts
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Hot-Dip Galvanizing
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HDG
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Superior corrosion resistance, ideal for outdoor and heavy-industrial applications
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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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Powder Coating
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-
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Offers durable, colored finishes for aesthetic customization
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Polishing (Brass/Aluminum)
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-
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Restores a high-shine finish, ideal for decorative applications
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