{"id":2847,"date":"2026-06-22T16:45:22","date_gmt":"2026-06-22T14:45:22","guid":{"rendered":"https:\/\/www.efsfasteners.com\/products\/nuts\/industrial-cap-nuts\/"},"modified":"2026-07-17T16:13:08","modified_gmt":"2026-07-17T14:13:08","slug":"industrial-cap-nuts","status":"publish","type":"page","link":"https:\/\/www.efsfasteners.com\/en\/products\/nuts\/industrial-cap-nuts\/","title":{"rendered":"Industrial Cap Nuts"},"content":{"rendered":"

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PRODUCTS<\/a> | NUTS<\/a><\/p>\n<\/div>

Industrial Cap Nuts<\/h1><\/div><\/div><\/div>
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Cap nuts, also known as blind nuts or acorn nuts, are fastening components characterized by a domed closed end that completely covers the end of the screw or stud after tightening.<\/p>\n

Their main function is to protect the exposed threaded section from impact, dirt, moisture and external agents, while also helping to improve assembly safety by eliminating potentially dangerous protrusions.<\/p>\n

Although they are not among the most widely used components in industrial fasteners, they are used in many mechanical and plant engineering applications where additional thread protection or a neater connection finish is required.<\/p>\n<\/div><\/div><\/div>

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Characteristics of Cap Nuts<\/h2><\/div>

The specific closed-end geometry distinguishes cap nuts from traditional hex nuts. Once installed, the blind nut encloses the end of the screw, preventing the thread from remaining exposed to the surrounding environment.<\/p>\n

This configuration makes it possible to reduce the risk of thread damage, limit the accumulation of contaminants and improve safety in areas accessible to operators.<\/p>\n

For these reasons, cap nuts are often used on metal structures, machinery, industrial equipment and assemblies subject to frequent maintenance operations.<\/p>\n<\/div><\/div><\/div><\/div><\/div>

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Industrial Applications of Cap Nuts<\/h2><\/div>

Cap nuts are used when the fastener passes completely through the component and the end of the screw would remain visible or exposed.<\/p>\n

The most common applications include light steel structures, industrial plants, handling equipment, automatic machines and mechanical systems where it is advisable to protect the thread from impact or contamination.<\/p>\n

In some cases, they are also selected for aesthetic or safety reasons, especially in installations where fasteners remain visible or accessible during plant operation.<\/p>\n<\/div><\/div><\/div>

DIN and UNI Standards<\/h2><\/div>

Cap nuts are commonly identified by the following standards:<\/p>\n