Acorn nuts, also commonly known as cap nuts, feature a domed, closed-end top that completely covers exposed bolt threads. This design provides a clean, finished appearance while protecting both the threads and surrounding surfaces from damage or corrosion. They are widely used in applications where aesthetics matter as much as functionality.
Applicable Standard：DIN 1587 (Metric acorn nuts – hexagon cap nuts)
Materials
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Brass: Decorative applications, corrosion resistance, warm appearance
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Steel: Carbon steel for general-purpose fastening
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Stainless Steel: Grades 304 (A2) and 316 (A4) for superior corrosion resistance
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Nylon: Lightweight, non-conductive, corrosion-proof
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Other materials available upon request
Surface Treatments
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Plain (as-formed)
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Zinc plating (clear, yellow)
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Nickel plating (common for brass)
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Chrome plating (decorative applications)
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Black oxide (steel)
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Passivation (stainless steel)
Available Types
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Low Crown Acorn Nuts: Shorter profile for confined spaces
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High Crown Acorn Nuts: Extended dome for maximum thread coverage
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Nylon-Insert Acorn Nuts: With built-in nylon locking element for vibration resistance
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