Dome Nuts (DIN 1587)
Q1: What is DIN 1587?
A1: DIN 1587 specifies the dimensions and technical requirements for Hexagon Domed Cap Nuts, commonly known as Acorn Nuts or Crown Nuts. This specialized nut features a closed, dome-shaped top that completely encloses the end of a bolt or threaded rod. Its primary functions are to provide a safe, finished appearance by concealing exposed threads and to protect both the threads and users from damage or injury caused by sharp edges. They are widely used where aesthetics, safety, and corrosion resistance are important.
Q2: What are the applications and uses of Dome Nuts (Acorn Nuts)?
A3: Domed Cap Nuts serve both functional and aesthetic purposes across a wide range of applications:
Safety & Protection: Their primary use is to cover exposed, sharp thread ends on bolts and studs, preventing scratches, snagging, and accidental injury in areas accessible to people. This is crucial in furniture, railings, playground equipment, and interior fixtures.
Aesthetic Finishing: They provide a smooth, rounded, and finished look, concealing unattractive fastener ends. This makes them popular in visible applications such as architectural metalwork, decorative fittings, automotive accessories, and consumer products.
Thread Protection: The dome acts as a barrier, shielding threads from dust, moisture, and corrosion, and can offer minor protection against vibration loosening in non-critical applications.
Material & Environment Suitability:
Stainless Steel (A2/A4): The preferred choice for outdoor, wet, or corrosive environments (e.g., marine hardware, outdoor sculptures, food processing) where both appearance and durability are needed. A4 (316) grade is used for highly aggressive environments like coastal or chemical exposure.
Plated Steel: Typically used for cost-effective, indoor applications where the protective cap is needed primarily for safety or appearance in dry conditions.
Material Selection Overview
Material Category |
Typical Grade |
Key Characteristics |
Ideal Application |
| Low-Strength Steel | Class 6 | Zinc-plated for basic corrosion resistance. About half the strength of medium-grade nuts. | Light-duty, indoor fastening where safety and appearance are needed over strength (e.g., panels, covers). |
| Stainless Steel A2 (18-8) | A2-70 | Good corrosion resistance, resists rust from water and mild chemicals. Polished finish for aesthetics. | Most common choice for outdoor fixtures, architectural details, marine interiors, and general use where corrosion resistance is required. |
| Stainless Steel A4 (316) | A4-80 | Excellent corrosion resistance, withstands harsh weather, salt water, and most chemicals. | Severe environments: marine exteriors, chemical plants, coastal architecture, and high-humidity/chemical exposure areas. |
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Active Stock List (All items are currently in stock)：
PIC |
PRODUCT |
SIZE |
GRADE |
FINISH |
THREAD |
 |
Dome Nuts (DIN 1587) - Stainless Steel (A2) | M3-M12 | A2 Grade | Natural | Coarse |
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Dome Nuts (DIN 1587) - Marine Stainless Steel (A4) | M3-M12 | A4 Grade | Natural | Coarse |
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Dome Nuts (DIN 1587) - Brass | M3-M12 | Brass | Natural | Coarse |
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Hexagon domed cap nut (DIN 1587) -high type-Steel Zinc plated 6 | M3-M12 | Class 6 | Natural | Coarse |