Company profile


  • Connector systems in insulation displacement,
    crimp or solder form
  • Solderless terminals
  • Crimp contacts
  • Customers’ special products
  • Terminating systems for all STOCKO products:
    hand tools, semi-automated and fully automated machines.


  • Domestic appliances
  • Heating industry
  • Industry
  • Automotive
  • Distribution


  • Wuppertal, Germany
  • Hellenthal, Germany
  • Andlau, France
  • Sokolov, Czech
  • Shanghai, China


DQS-certified integrated management systems

Approval company
DQS GmbH, Frankfurt

Certified according to

  • ISO 9001
  • ISO 14001
  • IATF 16949

Germany, France

Certified according to

  • ISO 50001

Hellenthal / Germany


  • 1901 in Wuppertal


  • 600 world-wide


  • 1998 was the Integration from STOCKO CONTACT into the WIELAND HOLDING GMBH


  • 2200 world-wide


  • 14


Development / Construction

Our laboratories test all components of their suitability for volume production. The quality and equipment of our laboratories are of such high level that the VDE approvals and certification institute uses them to carry out their own independent tests. These include VDE and even the stringent CSA and UL tests for the international markets.


STOCKO products are renowned and held in high estimation. They represent solid solutions and a multitude of applications as connectors and terminals.

The growing functionality and complexity in this sector, however, limits the usage of volume-produced standard components; more and more customers demand individual applications or new designs. Such processes need know-how, ideas, and adjustment to technical and economical philosophies in a sensible manner.

Together with our customers, we are concentrating our energy on the expected performance of the new product and, step by step, work out the details – the material, the surface finish, the physical properties and finally the design. For design and development, we have the most modern, computer aided systems at our disposal.

With the stereolithography method for example, we are in a position to check the precision of future products with the aid of prototypes, or manufacture prototype samples for testing purposes. Before reaching marketing stages, all STOCKO products are subjected to rigorous test procedures in our laboratories to check the mechanical and electrical properties as well as the influence they may have on the environment.




Absolutely essential and a decisive component in our successful connector technology, is our toolmaking capability and that takes place inhouse at STOCKO.

The production tools with which amongst other things the negative forms of housings are produced are of paramount importance that quality is assured, and our design teams for electro-technical components have to adhere to strict guidelines with regard to the mechanical design of such components.

All press and moulding tools are built by STOCKO according to the latest state of the art.

They are central in a value producing chain that ultimately is to the benefit of our customers.


Production of plastic mouldings


Production at STOCKO is concentrated in manufacturing centres to secure the highest quality even with growing output rates. Thus the whole production of plastic parts is at our Hellenthal plant.

With this location specializing on this sector, they can fully concentrate on to the highly technical requirements of those parts such as the production of a maximum number of pin count with a minimum contact spacing and the closest possible tolerances, processing special flame retarding plastic materials, usage of a wide range of materials, and a high machine output rate. For this, we rely on the most modern machines available. We compliment our fully automated moulding presses with intelligent ancillary devices and tooling from our own in-house production.

With regard to production techniques and the development of new possibilities for plastic materials, we are constantly aiming for the bestpossible solutions.This is hard cast quality.

Stamping technology

STAMPING technology

Stamping technology at STOCKO stands for the highest level of economy and quality. At our production centres in Hellenthal and Andlau we produce the precision stamped parts for our various product groups both in bands and loose.

For this we have the latest high-performance stamping machines with speeds of between 100 and 1400 strokes per minute and a compression force range of up to 160 tonnes. All the presses are equipped with the latest peripherals.

Rationalised production stages, a high level of automation and well designed integrated process monitoring systems guarantee year-on-year increased productivity that we ensure with the latest electronic quality control. Here we produce our stamped, drawn and formed parts with downstream composite tools made in-house and precisely tailored to the process architecture.

This creates further cost benefits that we can pass on to our customers.

Assembly technology

ASSEMBLY technology

Our connector systems are assembled by STOCKO in Hellenthal (Germany) and Sokolov (Czech Republic) using fully automated processes. Here, too, we applythe STOCKO philosophy of developing and producing most of the machinery, tooling and auxiliary devices in-house. The result is a highly flexible degree of automation leading to our high quality standards, which are assured with control systems that have also been developed in-house.

Highly flexible automation.


Machine building Machine building


We give high priority to our STOCKO terminating systems, because the quality and reliability of an electrical connection is largely determined by the high levels of the terminating technology.

That is why we allocate considerable financial resources to the development and production of such systems. In addition to quality, innovation and economies play important parts.

Our aim is to improve the productivity of our customers by integrating our terminating machines smoothly into their production processes.

Thus once more, STOCKO solutions act as catalysts and enable profitable competition. And to make sure everything runs smoothly, training is given to your staff for the various production processes, and our team of service engineers is always at your disposal with help and advice to ensure productivity all along the line.


from simple hand tools, to semi-automated machines, and ultimately to fully automated modular machines with "Just in Time" functions, computer controlled, automated quality control functions, modem connections for outside diagnostic centres and the option to programme sequences of cable forms.



We take it as our social responsibility to integrate environmental protection in our manufacturing processes. For this reason, the plating shop at our manufacturing centre at Andlau was only recently modernized and converted taking account of the latest environmental and ecological developments. In an elaborate process, all effluents are returned to nature, purified and completely free of harmful substances.


For it is the best argument for customers’ satisfaction and a solid position in a hard fought market.

This quality approach at STOCKO does not simply begin at the manufacturing stage. From the first initial contact, we wish our customers to know they are in safe hands and can rely on this also during the planning and development stages.

With an application oriented design, the uncompromising selection of the most suitable materials, and strict observation of the customers’ requirements profile. International standards can only act as guidelines for us.

We exceed their demands by setting our own additional standards: with our own designed testing programs, in-house laboratories, a continued striving for optimal organisational processes during all phases and a close exchange of experiences and know-how with our customers and users.

In addition to this, our quality offensive goes even further in that our environmental responsibilities are firmly imbedded in our manufacturing processes.Right from the development stage of our products, we aim for the conscientious use of our raw material resources.

All our plastics and metal materials are recyclable and our state-of-the-art production processes completely eliminate the use of chlorinated hydrocarbons and chlorofluorocarbons. Moreover and to avoid waste, STOCKO are using re-usable packaging systems such as blister packs, reels, and magazines.

Quality management certificate ISO 9001

DIN EN ISO 9001 AND IATF 16949

Having been awarded certification to ISO 9001, we have received approval that a quality management system is in operation throughout all areas of activity that assures a uniform high level of quality. Likewise, this is also the basis for specification IATF 16949. This certification is a prerequisite to qualify as supplier to the automotive industry. It acknowledges that the company has set up special procedures in all areas of activity and, therefore, complies with customers’ specific demands in the automotive sector. Thus and in the long-term, STOCKO increase the efficiency and safety for their customers and themselves.

DIN EN ISO 14001

In recent years we have with great commitment incorporated numerous improvement processes into our company environ-mental policy and constantly expanded them. Since 2011 our factory in Andlau has met the strict requirements of environmental management standard ISO 14001 and since 2012 our factory in Hellenthal has done so too. By doing so, we commit ourselves to a far greater extent than normal to the voluntary reduction of environmental risks such as waste, waste water and emissions. We are constantly planning, implementing and monitoring our goals in this regard. For us they are a major factor in our value system.


DIN EN ISO 50001

It has long been one of our corporate goals to keep increasing the energy efficiency in our plants while at the same time reducing energy consumption as well as CO2 emissions. For sustainable control and optimisation, STOCKO has developed an intelligent energy management system with which we can precisely detect any energy losses and initiate countermeasures at an early stage. ISO 50001 certification for this is for us the worthwhile supplement to ISO 14001. Whereas there energy is only a partial aspect, the focus in ISO 50001 lies on the energy efficiency of a company. With our energy management system we are, in the best-case scenario, even going beyond the strict requirements of this ISO because we can among other things increase our efficiency even without increasing our energy consumption.




Service and close proximity with our customers has always been a top priority and form an integral part of the STOCKO philosophy. Of course, to discuss with our customers their specific requirements and to meet their expectations in the best possible way is part of our flexibility. We wish to offer our customers superior performance characteristics and to support them in their business activities by anticipating future requirements.

Our customers shall be able to rely upon us so that they become true partners eventually. Partners, who we can assist with our know-how and comprehensive knowledge of the markets.

Particularly our sales engineers and our service engineers carry this part of our philosophy outside. Moreover, an extensive network of subsidiaries, sales offices, and agencies around the world assist in bringing this principle close to our customers wherever they are.

This network will be expanded still further during the next few years so that our customers can benefit from close on-site support even more efficiently. And should one of our customers ever ask if we are the right partners then something must have gone wrong from our part.




STOCKO is a company with a tradition going back for more than one hundred years. The foundation stone was laid by Alfred Aders, Heinrich Pfeiffer, and Johann August Stock 1901 at Wuppertal under the name of Stock & Co. - as button manufacturers. Amongst other items, they produced hollow rivets, eyelets, and press fasteners that, during the Wilhelmian boom era, were in great demand andwere even shipped to South America. When Stock & Co. developed the eyelet tag from a shoe eyelet with a solder tag added, the future direction of the company’s activities was set: electrical technologies. Very soon there followed additional pressed, drawn, and seamed metal parts all of which could be manufactured with the same machines as the button parts up until now.

STOCKO has met the great ruptures and frequent changes of the industry in masterly fashion. Today the company is well prepared to continue with the 100 year old tradition also in the future.


During the Weimar period that is during the twenties of the last century, the living habits of the people changed dramatically; modern electrical devices such as the radio, telephone, or even the electric shaver found entry into the households in large scale. The new direction of the company proved to be a particularly lucky move, 500 people were employed 1935; two years later there were already 1000. Now under the sole company name STOCKO. With the new factory at Malmedy in Belgium 1940, the company grew to a concern employing 1800 people. However, the war was not without consequences, and the numbersank down to 300. There followed the years of the so-called “economic miracle”, and STOCKO, too, gained by the new boom. Subsidiaries were founded like in England, France, Switzerland, and overseas. With the expertise, which STOCKO had gained in the manufacture of plastic parts, the product range was extended by film spools, tape cassettes, slide frames etc.. During these years, the expansions abroad continued steadily until far-reaching re-structuring measures took place during the nineties. In 1994, STOCKO divorced themselves from the division Fasteners. In 1998 a merger with the Bamberg Wieland Group took place and since then the company’s name is STOCKO Contact GmbH. & Co. KG. Today STOCKO employ about 600 people at three locations: Sales and Marketing are at Wuppertal, production is distributed among the plants at Hellenthal (Germany) and Andlau /France.

  • 1901


    Alfred Aders, Heinrich Pfeiffer and Johann August Stock are setting up the company Stock & Co. (abbreviated later to STOCKO) at Wuppertal. The first products are metal goods like hollow rivets, eyelets and press fasteners for sport belts with leather pouch that were exported into the Far East, South America and Africa. Four to five workers were the original core work force. August Stock whose name the company was bearing resigned already six months later. Nevertheless the company's name remained unchanged.

  • 1911


    The subsidiary factory at Hellenthal/Eifel is established. STOCK & Co. are already employing 110 workers at that time.

  • 1913


    Hugo Henkels, the commercial manager until then, becomes partner and eventually sole owner of Stock & Co.. He expands the 'Button Factory' into a metal manufacturing operation, toolroom extension, investments into efficient production machinery.

  • 1923


    The name 'STOCKO', already used as brand name for many years, becomes part of the company's name with the founding of STOCKO GmbH. Stock & Co., however, which was meanwhile changed into a limited partnership company, continues to operate but with the addition of "Metal and Celluloid Goods Works".

  • 1926


    Setting up a production at Leningrad that reaches a work force of more than 1000 employees in later years. In 1932, the Russian government takes it over against payment in full. This successor company still exists in a suburb of St. Petersburg. The proceeds of the sale were invested in the extension of the German plants and in a subsidiary in England that was founded shortly afterwards.

  • 1929


    At the end of the 1920s, the production of special parts for the electrical and radio industries is developed. A shoe eyelet with a solder tag added becomes an eyelet tag, shortly afterwards there follow other stamped, deep drawn and seamed metal parts for use in the electrical industry that were manufactured with the same machines as the traditional haberdashery items.

  • 1930


    Kurt Henkels, son of Hugo Henkels, joins the company.

  • 1933


    STOCKO set up a subsidiary in England.

  • 1935


    STOCKO employ a workforce of 500.

  • 1937


    The companies Stock & Co. and STOCKO are brought into a new company of unlimited liability. The new name: STOCKO Metallwarenfabriken Hugo und Kurt Henkels. The name Stock & Co. is discontinued. The company has a workforce of more than 1000 employees at the time and generated a turnover of over 6 million Mark.

  • 1940


    The subsidiary at Malmedy Is set up.

  • 1942


    STOCKO establish a subsidiary at Antwerp/Belgium.

  • 1943


    Part of production is transferred to Frankenstein/Silesia.

  • 1945


    Production is resumed immediately after the war: STOCKO manufacture amongst other items alarm clocks which were completely made up of pressed parts produced by STOCKO. These clocks were excellent objects of barter for foodstuff used in the works canteen for the benefit of the workforce. The developments during the war years obviously had consequences for the employment figures. The plants at Malmedy, Antwerp, Frankenstein (Silesia) and England were lost at the end of war. Whilst in 1940 STOCKO had more than 1800 workers, in 1945/46 there were only 300 left. The war damages suffered by the German factories were only of limited consequences, and after the Currency Reform in 1948 the company had a speedy recovery. The good relationships abroad were re-established already shortly after the war, a large number of agents of many years were installed again.

  • 1951


    STOCKO celebrate their 50th Anniversary, now again with more than 1000 employees.

  • 1957


    STOCKO FRANCE S.A., at Barr/France, is founded.

  • 1959


    The subsidiary HESTO (Henkels-Stocko) Ltd. is founded at Potters Bar (England).

  • 1960


    Dr. Dirk Henkels, son of Kurt Henkels, joins the company. At Zurich, the STOCKO Metallwaren AG is founded.

  • 1965


    Together with a German-Mexican partner STOCKO establish the subsidiary STOCKO Manufacturas Metalicas S.A.. Owing to turbulence in the currency market with the Peso, STOCKO sold the shares of this manufacturing company to this local partner.

  • 1968


    STOCKO take over the company of their distributor in the USA and set up production there together with the BLACKWOOD-STOCKO Corp.. An express service for small quantity orders is installed at Harscheid (Germany).

  • 1971


    Relocation of STOCKO-France S.A. from Barr to Andlau.

  • 1972


    At Malmedy the Belgian subsidiary STOCKOBEL S.P.R.L. is founded.

  • 1976


    STOCKO celebrate their 75th Anniversary.

  • 1978


    Founding of STOCKO TUNISIE S.A.R.L. Ez-Zahara in Tunisia. At the same time STOCKO Metallwaren AG at Zurich add the Sale and Marketing of products from the Electro - Electronics Division to their activities. STOCKO employ 94 trainees during this time.

  • 1980


    The work area at Andlau is extended by 2000 square metres.

  • 1981


    On 11 November, STOCKO exist for 80 years. The total number of people employed at home and abroad is 1700, every day almost 60 million parts are leaving the various production plants.

  • 1982


    The "Film-Foto" Division product range which includes already glass-free slide frames, film and audio-tape reels is being extended by the addition of video archive cassettes.

  • 1987


    Further to the extension in 1984, another 2000 sq. m are added to the work area at Malmedy which has now a total of 4500 square metres. The number of people employed there is now 200.

  • 1989


    STOCKO is founding a manufacturing company in Singapore that later establish their own subsidiaries in Malaysia and India.

  • 1990


    STOCKO Corporation, the subsidiary in the USA, move into own new administration and production premises.

  • 1992


    An new production unit is completed on the Wuppertal site with which the production area is increased by 3700 square metres.

  • 1994


    The STOCKO-Verschlusstechnik division is taken over by the Japanese group YKK and continues to trade under the new name STOCKO Fasteners GmbH.. Before the company was split, the consolidated turnover of all STOCKO companies together, with a workforce of about 1500, exceeded well over 200 million DM.

  • 1996


    Production in Tunisia is discontinued.

  • 1997""


    The extension of STOCKOBEL at Malmedy with a total floor area of 7200 sq.m for production, machine building, stores and dispatch as well as administration is completed.

  • 1998


    The Wieland Holding GmbH take over STOCKO Metallwarenfabriken, Henkels und Sohn GmbH & Co.. The company continues to trade under the new name STOCKO Contact GmbH & Co. KG.

  • 2001


    STOCKO celebrate their Centenary.

  • 2007


    STOCKO France celebrate their 50th anniversary at Andlau.

  • 2009


    The Malmedy factory, one of four production facilities to date, will be closed in spring 2009 and the production will be relocated to Hellenthal.

  • 2011


    STOCKO Hellenthal celebrate their 100th anniversary.

  • 2012


    A high volume of investment in all factories and divisions.

  • 2013


    Significant improvement in infrastructure, machinery and large parts of production.

  • 2014


    Production area extension by 1,000m² in Hellenthal.

  • 2014


    Construction work in the order of 3,000m² is being completed in Andlau.

  • 2016 / 2017

    2016 / 2017

    The Andlau Factory undergoes a continuous optimisation of its manufacturing processes through various restructuring measures. To ensure the further growth of STOCKO France, plots of land with a total area of 20,000m² were purchased in 2016 and a property with a floor area of about 3,500m² situated on that land was completely renovated.

  • 2017


    STOCKO pursues its growth strategy and makes a further investment at the Hellenthal location to increase the production and administration area by about 3,000m² through a new factory building.

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