Blind Nuts: Uses and Characteristics

What are blind nuts?

A blind nut is an element characterized by a non-through hole, having one of the two ends blind (hence the name). One version of this item is produced with a cap – a semi-spherical part – precisely at the end.

Figure 11. Blind Nut with Spherical Cap

A blind nut is predominantly used to tighten the protruding threaded part of a screw or a rod, thus as an aesthetic solution. Generally, this particular element is applied where a reliable threaded connection is required.

Reliability is dictated by the selection of the element of correct dimensions and materials, in reference to DIN 1587 standard.

The element can be supplied in:

• Carbon Steel
• Galvanized Steel
• Brass, Bronze, and Aluminum
• Plastic
• Stainless Steel

One of the best performances is provided by stainless steel blind nuts, a material of excellent quality capable of resisting corrosion and lasting over time.

These products are used for various creations, from mechanical equipment to electronic devices, but it is a market that experiences continuous expansion in relation to applications.

Different Blind Nuts for Different Applications

As mentioned in the previous paragraph, blind nuts can be used in various fields:

• Mechanical Industry;
• Instrumentation;
• Furniture Manufacturing;
• Food Industry;
• Design, etc.

Also in this case, in relation to the final use, it is possible to choose between different products:

• Low-profile blind hex nut

• Blind lock nut with nylon cap

• Blind hex nut with spherical cap

Usually, the application of a blind nut does not require the use of a washer, except in cases where the connection must be strong and thus the nut, associated with the washer, will act as a counter nut.

A factor to consider for the correct choice is also the pitch of the threading, which can be coarse or fine.

Dimensions of Blind Nuts

Blind nuts come in different sizes. Among the most used and commercial sizes, we find, for example, diameters M8, M10, and M12, having respectively dimensions of 8, 10, and 12 millimeters.

In general, each standard provides different ranges of diameters in which the nuts can be produced:

• DIN 917 Low profile blind nut galvanized steel - diameters supplied from M4 to M36;
  
  
• DIN 917 Low profile blind nut stainless A2 - diameters supplied from M4 to M30;
  
  
• DIN 917 Low profile blind nut brass - diameters supplied from M4 to M20;
  
  
• DIN 986 Blind lock nut with nylon cap galvanized steel - diameters supplied from M4 to M16;
  
  
• DIN 986 Blind lock nut with nylon cap stainless A2 - diameters supplied from M4 to M16;
  
  
• DIN 1587 Blind hex nut with spherical cap in galvanized steel - diameters supplied from M3 to M30;
  
  
• DIN 1587 Blind hex nut with spherical cap in stainless A2 - diameters supplied from M4 to M30;
  
  
• DIN 1587 Blind hex nut with spherical cap in stainless A4 - diameters supplied from M4 to M27;
  
  
• DIN 1587 Blind hex nut with spherical cap in brass - diameters supplied from M3 to M24;
  
  
• DIN 1587 Blind hex nut with spherical cap in nickel-plated brass - diameters supplied from M3 to M12;
  
  
• DIN 1587 Blind hex nut with spherical cap in plastic - diameters supplied from M3 to M16.

Thus, in relation to uses and needs, it is possible to select the most suitable element for every final destination.

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