Overview
An Acorn Nut, also known as a cap nut, is a specialized fastener designed to cover the exposed threaded end of a bolt or screw, providing both protection and a finished appearance. Its distinctive domed shape prevents damage to the threads and reduces the risk of injury from sharp edges, making it ideal for applications where safety and aesthetics are important. Manufactured through precision machining or cold forging processes, the Acorn Nut is typically made from materials such as stainless steel, brass, or carbon steel, which offer excellent corrosion resistance and mechanical strength. The internal threading is engineered to ensure a secure fit, maintaining the integrity of the fastening assembly under various load conditions. Key features include its smooth, rounded exterior and durable construction, which contribute to its widespread use in automotive, machinery, and construction industries where reliable fastening and protection are critical.
The performance of the Acorn Nut is characterized by its ability to withstand environmental factors such as moisture, chemicals, and temperature fluctuations, making it suitable for both indoor and outdoor applications. Its design not only enhances the safety of mechanical assemblies by preventing snagging and injury but also improves the overall durability of the fastening system by shielding the bolt threads from contaminants and corrosion. The versatility of the Acorn Nut allows it to be used in a range of sectors, including industrial equipment, furniture manufacturing, and electrical installations, where both functional and aesthetic considerations are paramount. By combining robust materials with precise manufacturing standards, the Acorn Nut delivers consistent performance, ease of installation, and long service life, making it a preferred choice for engineers and designers seeking reliable and efficient fastening solutions.
| Product Type | Acorn Nut |
| Head Style | Domed Cap Head |
| Manufacturing Process | Cold Forged or Machined |
| Thread Type | Unified National Coarse (UNC) or Unified National Fine (UNF) |
| Common Materials | Steel, Stainless Steel, Brass, Nylon |
| Available Sizes | #4 to 1-1/2 inch diameter |
| Strength Features | Corrosion Resistant, Durable, Provides Thread Protection |
| Typical Applications | Decorative Finishes, Protecting Threads, Automotive, Machinery |
| Surface Finishes | Zinc Plated, Chrome Plated, Nickel Plated, Black Oxide, Plain |
| Standards | ASME B18.2.2, DIN 1587 |
| Customization | Custom Sizes, Materials, Threads & Surface Finishes Available |
The domed cap prevents damage to exposed threads and protects against corrosion and debris ingress, extending fastener life.
Provides a smooth, attractive appearance suitable for visible applications in automotive and furniture industries.
Available in stainless steel and brass, offering excellent resistance to rust and environmental factors.
Covers sharp bolt ends to reduce injury risks in machinery and equipment applications.
Available in a wide range of diameters and lengths to fit various bolt sizes and applications.
Designed for standard wrench or socket tools, enabling quick and secure fastening.
| Product Type | Acorn Nut (Cap Nut) |
| Thread Type | Metric and UNC/UNF |
| Diameter Range | M4 to M24 |
| Length Range | 6 to 50 mm |
| Available Materials | Stainless Steel, Carbon Steel, Brass |
| Manufacturing Standards | ASTM A194, DIN 1587, ISO 4032 |
| Surface Finish | Plain, Zinc Plated, Polished |
| Diameter (mm) | Height (mm) | Hex Size (mm) |
|---|---|---|
| M4 | 7 | 7 |
| M6 | 9 | 10 |
| M8 | 11 | 13 |
| M12 | 16 | 18 |
| M16 | 21 | 24 |
| M24 | 30 | 36 |
