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HARD LOCK RIVET (Steel, Aluminium and Stainless Steel).

High resistance single-side access fastener. It is designed for the most demanding applications when it comes to tensile and shear strengths. The Bralo Hard Lock rivet, due to its large expansion on the blind side, is suitable for applications with thin sheets.


Bralo Hard Lock Rivet has been designed for the fastening of elements that require exceptional tensile and shear strengths. It has been designed to meet the most heavy-duty fastening applications and ensures a high quality fastening.

The load and torque forces are well distributed, due to its feature of large expansion on the blind side. It is, therefore, particularly suitable for the work with thin sheets.

Its unique grooved mandrel design allows the head of the rivet to be completely held inside the body due to a mechanical locking, avoiding thus any kind of electrical problems and noises caused by loose mandrels. It allows a homogeneous riveting, a solid and high quality joint that resists all kinds of vibrations.



Features and benefits

  • Exceptional shear and tensile strengths.
  • Single-side access.
  • Effective head locking system through a mechanical locking of the grooves.
  • Large bearing area on the blind side.
  • Excellent torque values for the fastening of the parts at work, especially suitable to work with thin sheets.
  • Both the load and the torque forces are well distributed due to the wide expansion on the blind side.
  • Solid and high quality fastening, resistant to vibrations.
  • Excellence and long durability.
  • It requires fast and secure tools.

Materials to be fixed

Metal to Metal

  • Aluminium
  • Steel
  • Stainless steel


Thin metal to thick metal


  • Automotive industry
  • Bodyworks and commercial vehicles.
  • Construction
  • Ladders and shelves
  • Containers
  • Railway

Technical Characteristics

Materials:Aluminium, Steel and Stainless Steel

Diameters:6.4 mm.

Head:     Dome head

Dome head
It is the most versatile type of head. It provides enough bearing surface to retain all kinds of materials, except those extremely smooth and brittle.

Body Mandrel 2,4 mm 3,0 mm 3,2 mm 4,0 mm 4,8 mm 5,0 mm 6,0 mm 6,4 mm 9,7 mm
Steel Steel          
Stainless st. Stainless st.                
Aluminum Aluminium                


Additionally this Bralo Hard Lock Rivet is also available in a Super-Large Head of 19 mm.


Bralo have no limits when it comes to variety. Our intensive search for materials and our constant use of innovative technology have established the widest range of finishes in the market.

To avoid the effects of external agents, the most appropriate finishes for the Bralo Hard Lock Rivet are: zincating or organic coating. Zincating is a zinc coating that not only protects steel from oxidation and corrosion, but it also improves the visual aspect of the item. Depending on the required strength in each application, there are various available zincating options: the galvanic zincating, where the zinc is the only metal that forms the suffering layer and the nickel zincating, with a resistance twice as high as that of the normal zincating, making it suitable for automotive and weather resistant applications. The latter is also available in a transparent, shiny look that can be silver and black.

Besides, Bralo Hard Lock Rivet is also available, in any kind of material, in an infinity of lacquering with liquid epoxy painting. From black to white, we have a range of over 50 RAL colours and we can make special lacquering under request.

Bralo Hard Lock Rivet is available in an anodised finish or with an organic coating (Delta Seal), which give the rivet a higher resistance and durability.


Steel Lacquering, zincating (galvanized and alloys) and organic coating
Aluminum Lacquering, anodising and organic coating.
Stainless st. Lacquering

With working alongside the customer, we can make custom designs adapting to the specific needs of every application. Please contact us, should you need more information about special finishes.

Name Body Mandrel Dome Large Countersunk
Hard Lock Steel Steel    
Stainless st. Stainless st.    
Aluminium Aluminium    

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