DIN 1587 carbon steel domed cap nuts, also known as acorn nuts, are standard hexagonal fasteners with a full closed high dome design. Different from low-profile DIN 917 cap nuts, DIN 1587 features a taller dome structure, which fully covers exposed bolt threads to offer reliable protection against dust, moisture and corrosion.
Made of premium carbon steel with stable mechanical performance and multiple strength grades. Various surface treatments such as zinc plating, nickel plating and Dacromet are available for anti-rust and durable use. We provide full metric sizes from M3 to M24 in stock, supporting standard specifications and customized non-standard sizes. Widely used in machinery, automotive, furniture and general industrial assembly for safe and neat finishing.
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DIN 1587 Carbon Steel Cap Nut | High Dome Thread Protection, Standard & Custom Available
Key Features
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High-quality carbon steel body with stable structural strength
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High closed dome design for full thread protection
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Prevents corrosion, dust and thread damage for longer service life
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Smooth dome surface for safe installation and decorative appearance
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Multiple plating options for excellent corrosion resistance
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Full metric sizes in stock, OEM customization supported