Cap Nuts Grade A2 Stainless DIN 1587 Decorative Hex Domed Nuts
Manufacturing standard：ISO, GB, JIS, DIN, BS and ANSI standards, or drawings provided by customers.
Materials： iron, carbon steel, alloy steel, copper, stainless steel, plastics, high-temperature alloy, copper alloy, nickel-base alloy, high-strength alloy, corrosion-resistant alloy, etc.
Process： cold heading, punching, turning, milling, wire cutting, etc.
Treatment/Finishing: Brushing、Anodizing、Zinc Plated、Nickel Plated、Sn Plated.
Requirements： No Burrs、Scratches、Dents、Pits
Application： Structural Steel; Metal Building; Oil&Gas; Tower&Pole; Wind Energy; Mechanical Machine; Automobile: Home Decorating
Packing：bulk in cartons (25kg Max.)+wood Pallet or according to customer special demand
Cap nuts, also known as acorn nuts, are a critical component in fastening systems where aesthetics and safety are essential. Manufactured to standards such as DIN 1587, cap nuts are commonly produced in Grade A2 stainless steel or carbon steel with zinc plating, providing reliable resistance to corrosion, making them ideal for both indoor and outdoor environments.
Structurally, a cap nut features a closed-end hexagonal design that not only protects exposed bolt threads from mechanical damage but also prevents moisture ingress, which can lead to thread corrosion. The domed top enhances visual appeal, often used in furniture assembly, automotive trim, and exposed mechanical joints where appearance matters. For metric systems, cap nuts are usually available in M4 to M24 sizes, compatible with ISO metric coarse and fine threads.
From a mechanical engineering perspective, the design of cap nuts reduces injury risk caused by exposed threaded studs, especially in public-facing installations. This functionality makes them preferable in applications like playground equipment, bicycle frames, and architectural railings.
As a fastener manufacturer and supplier, we ensure that our cap nuts conform to international standards including ISO 4032, DIN 934, and DIN 1587, while providing customizable options in terms of material grades, surface coatings, and thread specifications. Clients across automotive, construction, and equipment manufacturing sectors frequently require cap nuts in Grade A4 marine stainless or brass for industry-specific performance.
