Elastic pin or “Mécanindus"

Very numerous industries from automotive to electronics use elastic pin for a wide range of applications. The company RHD is an elastic pin manufacturer.


Compression spring

We manufacture cold-coiled compression springs.

Wave spring

We manufacture wave springs to meet simple or complex requirements.

Tension spring

We manufacture tension springs to meet simple or complex requirements.

Torsion spring

We manufacture torsion springs to meet simple or complex requirements. They can be manufactured from standard machines or specific tools.

Wire form spring

Wire forms are used for a wide variety of applications. Pins, hooks, clips, electrical contact parts, and more, they can be manufactured from standard machines or specific tools.

Flat spring

Flat springs are made using special tools. They can be produced following their morphology on a radial or linear press. RHD has seasoned experts on both types of machines.

Sub-assembly spring

RHD can offer its customers the option of pre-assembly on machine during production in order to shorten the assembly stages and achieve productivity improvements. We are also able to assemble our part with a part supplied by the customer.

Our offer


Springs and metal pins specialist

Numerous assets allowed us to regain prestige both on the French market and on the international market. The group RHD is a pioneer in the “sharp" domain of elastic pin manufacturing for half a century. The president of the group, Georges Huon, made it his business. The strategy of growth the RHD group establishes itself on a road map of continuous, common investment over several years, a better world market position, the deployment of innovative means of production, a thoughtful choice of the crenels of growth – a choice more centred towards cosmetic and the automobile market. RHD is a major reference in design of industrial springs today.

We align ourselves among the reference actors, due to the added value which we bring, the advice and the accompaniments offered to the prospects, the fact that we are very fastidious in the initiatives which we undertake.

Characteristics of the elastic pin

Elastic pin, which is used in the assembly of heavy parts, is available in different dimensions. Thus, it is possible to obtain a standard elastic pin, thinner, lighter and more resistant or thick as required. For the manufacturing of elastic pin, different raw materials are used: stainless steel, chromium or nickel, steel or carbon fibers. The selection of the appropriate raw material depends on the type of pin you want: spiral or cotter elastic pin, etc.

Features and benefits of the elastic pin

The elastic pin is a variation of cold wrapped and rolled pin, which is then cotter in the longitudinal direction. A pin has multiple functions. It can be used to fit or position (in this case one speaks of “positioning pin”) a part to another and act as an axis or safety part.

Thanks to its flexibility, elastic pin can withstand significant shock loads while preventing the other components of the risk of damage, which is not the case with solid pins that alter adjacent elements due to their rigidity. Elastic pin owes its strength and lightness to the type of material used for its design, and heat treatment used by the manufacturer.

The use of elastic pin also allows considerable time saving when fitting parts. Actually, technicians only need to drill a hole without drilling, and then introduce the pin manually or by automatic assembly. These advantages makes the use of elastic pin essential in assembly lines

Among the very numerous items whose orderly functioning requires one or several small springs,  one can find shock absorbers, lighters, bottles of perfume, robots and industrial machines, watches. Although they are usually hidden, springs are major parts for a vast number of objects for everyday use. Because of exposure to multiple kinds of stresses and small dimension, manufacturing springs imposes compliance with the highest quality standards. Cutting-edge fields,, including automotive, pharmaceutical or high-tech industries attach great importance to the springs that make up their products.