{"id":2803,"date":"2026-06-12T16:44:53","date_gmt":"2026-06-12T14:44:53","guid":{"rendered":"https:\/\/www.efsfasteners.com\/products\/screws\/industrial-grub-screws\/"},"modified":"2026-07-17T15:58:36","modified_gmt":"2026-07-17T13:58:36","slug":"industrial-grub-screws","status":"publish","type":"page","link":"https:\/\/www.efsfasteners.com\/en\/products\/screws\/industrial-grub-screws\/","title":{"rendered":"Industrial Grub Screws"},"content":{"rendered":"

<\/div>

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

Industrial Grub Screws<\/h1><\/div><\/div><\/div>
<\/span><\/div><\/div><\/div><\/div><\/div>
<\/div>
<\/div><\/div>
<\/div><\/div><\/div><\/div><\/div><\/div><\/div>

Industrial set screws are fastening components used for locking and positioning mechanical components within shafts, hubs, pulleys, couplings and transmission elements.<\/p>\n

Also known as headless screws or grub screws, they are screwed completely into the threaded seat and operate by applying controlled pressure to the component to be locked. This configuration makes it possible to create compact connections with no external protrusions, suitable for mechanical assemblies subject to rotation or limited installation space.<\/p>\n

Their main function is not to generate the preload typical of structural fasteners, but to prevent unwanted movement, maintain the correct positioning of components and contribute to torque transmission in mechanical systems.<\/p>\n<\/div><\/div><\/div>

<\/div><\/div>

Characteristics of Industrial Grub Screws<\/h2><\/div>

Set screws are generally manufactured with full thread and a hexagon socket drive, a solution that allows easy assembly even in confined spaces.<\/p>\n

Compared to other types of fasteners, they offer the advantage of being installed completely inside the component without altering its external dimensions. This characteristic makes them particularly common in transmission systems, gearboxes, automation equipment and machine tools.<\/p>\n

The choice of grub screw must take into account not only the dimensions, but also the operating conditions, the material of the mating parts and the expected frequency of maintenance or disassembly.<\/p>\n<\/div>

Types of Grub Screws According to ISO 4026, 4027, 4028 and 4029<\/h3><\/div>

UNI EN ISO standards define the main configurations of hexagon socket set screws.<\/p>\n<\/div>

ISO 4026 \u2013 Flat Point Grub Screws<\/h4><\/div>

The flat point ensures uniform pressure distribution on the contact surface and is suitable when deformation of the clamped component needs to be limited.<\/p>\n<\/div>

ISO 4027 \u2013 Cone Point Grub Screws<\/h4><\/div>

The cone point allows precise positioning and good resistance to displacement thanks to its localized action on the mating material.<\/p>\n<\/div>

ISO 4028 \u2013 Cup Point Grub Screws<\/h4><\/div>

The cup point is one of the most widely used configurations in industrial applications. Its concave geometry provides effective grip on the shaft and ensures a good balance between holding performance and ease of assembly.<\/p>\n<\/div>

ISO 4029 \u2013 Dog Point Grub Screws<\/h4><\/div>

Dog point grub screws are used when a precise fit with dedicated seats or machined reference points is required.<\/p>\n<\/div><\/div><\/div><\/div><\/div>

<\/div>

NEED A PARTNER FOR SPECIAL BOLTS?<\/h3><\/div>

We supply custom-designed fasteners for critical applications \u2014 with certified quality, full traceability, and technical support.
Fill out the contact form or call us: our team is ready to assist you with tailored solutions.<\/p>\n<\/div><\/div><\/div>

CONTACT US<\/span><\/a><\/div><\/div><\/div><\/div><\/div>\n

Industrial Applications of Set Screws<\/h2><\/div>

Industrial set screws are used in many mechanical systems<\/a> where a component needs to be locked or positioned without using more complex fastening solutions.<\/p>\n

They are used, for example, in:<\/p>\n