Half hexagonal insert nut

Fastener element with a round-hexagonal body that provides a great resistance to rotation and extraction. The Bralo Half-hexagonal Insert Nut guarantees a solid and durable joint.

The hexagonal insert nut is a mechanical fixing element that provides a grooving feature in applications with a single-side access that require a very high resistance to rotation. It is ideal for applications with thin metal sheets, tubes, extrusion or plastics.

It offers a great mechanical resistance. Compared to round body insert nuts, the half-hexagonal shape of the section and its inner hole substantially increase the resistance to rotation and extraction in metal sheets. The result is a homogeneous riveting that ensures a solid and high quality joint.

The result is a homogeneous riveting that ensures a solid and high quality joint.

Features and benefits
  • The hexagonal shape of the section and the inner hole doubles the resistance to rotation in thin sheets, compared to the insert nuts with round body.
  • Excellent solution to obtain a grooving feature in items with reduced thickness (0.5mm).
  • Single-sided access (blind insert nut).
  • The conical end of the body and the hexagonal shape allow for an easy insertion.
  • It offers an exceptional mechanical resistance that prevents rotation.
  • Versatility. They function both as an insert nut and a joint rivet.
  • It resists usual unscrewing.
  • The surface does not suffer from heat stress nor deformations.
  • It is available in different finishes that improve its resistance to corrosion.
  • Available in large, flat and in reduced head.
  • Its installation can be incorporated at any stage of production.
  • Fast and high precision assembly.
  • It requires simple and ergonomic tools, that can be pneumatic, automatic or hand tools.
  • The riveting process is environmentally friendly, free of smoke, sparks, fumes, etc.
  • Automotive industry
  • Trucks
  • Bodywork. Industrial and military vehicles.
  • Metal industry
  • Metal carpentry
  • Electrical appliances.
  • Electronics
  • Recreational and fitness equipment
  • Bicycles
  • Air conditioning –HVAC-
Technical characteristics

Materials: Aluminium, Steel and Stainless Steel.

Diameters: M-3, M-4, M-5, M6, M-8, M-10, M-12

Heads: Large, flat and reduced heads.

Large Head
It provides a big bearing area that strengthens the hole and prevents traction or pulling failures. It can also be used as a separator.
Flat Head
It allows the creation of a virtual flat surface on the material.
Reduced Head
It offers the possibility of creating a virtual flat surface without the need of a drilling machine.

Fondo: Open and Closed

SteelZincating (galvanic and alloys)

·         NYPLAS

Under request, this large head half-hexagonal insert nut is available with a PVC sealing under the head. This ring provides a bigger sealing that absorbs vibrations and increases the item resistance to temperature variations.


The square insert nut increases the drilling life, compared to the hexagonal insert nuts. It is made in steel and available with large head.