STM Quality Limited is proud to be associated with the following clients:


Key technologies for combustion, hybrid and electric vehicles.

Hofer Powertrain UK

The hofer group of companies is one of the leading providers of automotive engineering consultancy services in the world. 

Argus Powerbend Ltd

Hiflex Europe is dedicated to providing high quality and cost effective design and production of hose and tube assemblies for a wide range of markets. 

Gardner Denver Limited

Gardner Denver is a global manufacturer of industrial air compressors, blowers and vacuum products. With a wide range of technology styles that can tailor to your application needs. 

Darchem Engineering Limited

Aerostructures offers a design and manufacture service for high temperature precision fabrications in stainless steel, titanium and nickel alloys for use in gas turbines in the air, on land and at sea. 

Progress Rail Services UK Limited

Progress Rail Services UK Ltd. specialises in the design and manufacture of permanent way switches and crossings and engineered products for mainline, freight, industrial and light rail customers in the UK and globally.

ElringKlinger GB

Teesside-based ElringKlinger GB Ltd is a subsidiary of the multinational company ElringKlinger AG. Experts in the design and manufacture of speciality gaskets from both soft and hard materials, the company also produces sealing solutions for engine, transmission and exhaust applications, as well as manufacturing heat shields both for engine bay and under body. 

Ferrograph Limited

Ferrograph Limited is the UK’s leading designer and manufacturer of electronic public information displays, digital advertising displays and interactive information kiosks.


Innovative technology for a changing world.

Borgers Limited

Borgers develops and produces acoustically efficient components for automobiles. As particularly lightweight trim and carrier components and insulations they are used in the interior and exterior of all types of vehicles – from convertibles to heavy trucks.

Taylor Engineering and Plastics Limited

Taylor Engineering & Plastics specialises in the manufacture of technical plastic mouldings for a wide range of industries.

By offering the optimum choice of production processes and materials, supported by the latest technology and best-practice quality systems, TEP provides a cost-effective solution to its customers’ polymer requirements.

PJS Mouldings Limited

PJS specialise in plastic injection mouldings, supplying a variety of industries including automotive and leisure, offering a product development facility from concept to finished production.

Rosti McKechnie Limited

For more than 60 years, Rosti has built its reputation as a supplier of precision injected moulded products, for some of the world’s leading brands.


Handicare offers solutions and support to increase the independence of disabled or elderly people as well as to improve the confidence of those who are caring for them.

Nifco UK Limited

Nifco specialise in the design, manufacture and supply of precision injected moulded functional plastic parts. From plastic fasteners to dampers and grab handles for the automotive industries.

Welwyn Components

TT electronics Welwyn Components is a world leader in the design and manufacture of resistors and microelectronic assemblies for global customers.


Manufacturer of terminals, component assemblies and applicator systems. 


Caterpillar is the world’s leading manufacturer of construction and mining equipment, diesel and natural gas engines, industrial gas turbines and diesel-electric locomotives. 


Truck-Lite is a global leader in the design and manufacturing of vision systems, servicing the automotive and commercial vehicle industry. 

Gestamp Washington UK Limited

Gestamp UK manufactures body panels, brake and clutch assemblies for the automotive industry and boasts Nissan, Jaguar and General Motors amongst its major O.E.M. customer base. 

ABSL Power Solutions Limited

The intelligent batteries and smart charging solutions specialist. ABSL is the only volume manufacturer of lithium-ion cells within the United Kingdom and is a world leader in the research, design, development and delivery of power solutions for customers who cannot afford failure. 

Assa Abloy

Assa abloy’s product offer spans from mechanical locks to keyless entries and intelligent door openings. 

Rieter Automotive

Rieter develops and manufactures machines, systems and components for processing natural and man-made fibres and their blends into yarns. The company is the only supplier worldwide to cover spinning preparation processes and also all four spinning processes that are established on the market. 

I.A.C. Group

IAC is a supplier of automotive interior and exterior systems and components. 

Mitsumi UK

Electronic component manufacturer. 

Rolls Royce North East Training Centre

Rolls Royce North East Training Centre is an approved training provider based in Newcastle upon Tyne, offering apprenticeships in mechanical, fabrication, electrical and general engineering, at N.V.Q. levels 2 and 3. They also provide ‘Train to Gain’ to a diverse employer client base.