Aerospace and Defense Springs

Aerospace and Defense Springs Market Outlook

The global Aerospace and Defense Springs market is projected to reach approximately $5 billion by 2035, with a compound annual growth rate (CAGR) of around 6% from 2025 to 2035. This growth is primarily driven by the increasing demand for lightweight and high-performance materials in aviation and defense applications, as manufacturers strive to enhance the efficiency and durability of their products. The expansion of defense budgets across various countries, driven by geopolitical tensions and the need for enhanced military capabilities, also plays a significant role in boosting the market. Additionally, advancements in technology, coupled with the growing emphasis on reducing operational costs through innovative spring designs, are expected to further fuel market growth. Ultimately, a combination of rising global air travel and ongoing defense modernization initiatives will continue to shape the Aerospace and Defense Springs market landscape.

Growth Factor of the Market

The Aerospace and Defense Springs market is experiencing a robust growth trajectory, primarily fueled by several key factors. One of the most significant drivers is the rapid advancement in aerospace technology, which necessitates the development of high-strength, lightweight springs that can withstand extreme conditions while ensuring reliability. Additionally, the increasing focus on fuel efficiency and performance improvement in aircraft design is leading manufacturers to seek out innovative spring solutions. The defense sector is also witnessing a surge in demand due to rising global tensions, prompting governments to allocate larger budgets for military upgrades and modernization efforts. Furthermore, the proliferation of electric and hybrid propulsion systems in aerospace applications is creating new opportunities for spring manufacturers, compelling them to innovate and adapt to changing technologies. The expansion of aerospace manufacturing facilities, particularly in emerging economies, is expected to open new avenues for market growth.

Key Highlights of the Market

• The Aerospace and Defense Springs market is projected to reach $5 billion by 2035.
• It is expected to grow at a CAGR of 6% from 2025 to 2035.
• Technological advancements are pushing the demand for lightweight and durable materials.
• Increased defense budgets across various countries are driving market expansion.
• Emerging economies are becoming critical players in aerospace manufacturing.

By Product Type

Compression Springs:

Compression springs are one of the most widely used types of springs in the aerospace and defense sectors, playing a crucial role in applications requiring resistance to axial loads. These springs are designed to compress under load and return to their original length when the load is removed, making them essential in various systems such as landing gear, engine components, and hydraulic systems. The growing demand for lightweight yet robust components in modern aircraft is driving innovation in compression spring design, leading to the use of advanced materials and manufacturing techniques to enhance performance. Furthermore, as aircraft manufacturers continuously strive to improve fuel efficiency and reduce weight, the reliance on high-performance compression springs is expected to increase significantly in the coming years, contributing to market growth.

Extension Springs:

Extension springs are specifically designed to absorb and store energy as they are stretched, making them vital in numerous aerospace applications. These springs are commonly used in systems that require a pulling force or tension, such as control surfaces, landing gear retraction mechanisms, and missile deployment systems. The need for reliable and durable extension springs is heightened by the stringent safety and performance standards in the aerospace and defense industries. As manufacturers focus on developing more efficient systems, they are increasingly integrating extension springs made from high-strength alloys, which enhance performance and service life. The growing trend of miniaturization in aerospace components further emphasizes the importance of extension springs designed to fit compact spaces while maintaining functionality.

Torsion Springs:

Torsion springs are essential components that store energy when twisted, making them ideal for applications requiring rotational motion. In the aerospace and defense sectors, these springs are used in various mechanisms such as landing gear systems, control surfaces, and even in missile systems. The ability of torsion springs to operate under extreme conditions, including high temperatures and stresses, makes them indispensable in ensuring the reliability of critical aerospace applications. The increasing focus on improving maneuverability and performance in modern aircraft is driving the demand for innovative torsion spring designs. Additionally, advancements in materials and manufacturing processes are enabling the production of lighter and stronger torsion springs, providing an added advantage for manufacturers looking to optimize their designs and improve overall system efficiency.

Constant Force Springs:

Constant force springs are specialized springs that exert a constant force over their entire range of motion, making them ideal for applications requiring consistent tension. In the aerospace and defense markets, these springs are utilized in various scenarios, including the deployment mechanisms of parachutes, missile systems, and various actuation systems. The precision and reliability of constant force springs are critical in ensuring that aerospace systems operate effectively under dynamic conditions. As the industry moves towards more automated and sophisticated mechanisms, the demand for constant force springs designed to meet specific application requirements is expected to grow. Furthermore, the integration of these springs into advanced systems aligns with the broader trend of enhancing the performance and reliability of aerospace vehicles.

Belleville Springs:

Belleville springs, also known as disc springs, are widely used in aerospace and defense applications due to their ability to provide a high load-carrying capacity in a compact space. These springs are often employed in shock absorbers, clamping mechanisms, and even in multi-spring assemblies where space and weight constraints are critical. The growing trend towards miniaturization in aerospace design, particularly in unmanned aerial vehicles (UAVs) and satellites, is driving increased adoption of Belleville springs. Their unique design allows for stacking to achieve higher spring rates without increasing the overall size, making them particularly valuable in applications requiring efficient use of space. As demand for advanced aerospace systems continues to rise, the role of Belleville springs in optimizing performance is expected to gain prominence.

By Application

Aircraft:

The aircraft sector is one of the largest consumers of aerospace springs, with a demand driven by the need for safety, performance, and efficiency. In both commercial and military aircraft, springs are utilized in a wide range of applications, including landing gear, control systems, and cabin mechanisms. Given the increasing focus on reducing weight and enhancing fuel efficiency in aviation, manufacturers are prioritizing the development of advanced spring technologies that can meet stringent aerospace standards. The integration of lightweight materials such as titanium and high-strength alloys in spring manufacturing is becoming increasingly prevalent, aligning with the industry's goals of sustainability and cost-effectiveness. As global air travel continues to expand, the aircraft segment is expected to experience significant growth in its demand for high-performance springs.

Defense Vehicles:

In the defense sector, springs are essential components in a variety of military vehicles, including armored personnel carriers, tanks, and helicopters. These springs are crucial for ensuring the stability and maneuverability of defense vehicles under various operating conditions. The need for robust and durable springs is heightened by the demanding environments in which military vehicles operate. As defense budgets continue to increase worldwide, the demand for advanced military technology, including innovative spring designs, is set to rise correspondingly. The focus on enhancing the performance of defense vehicles, particularly in terms of suspension systems and weapon platforms, will further drive the growth of this segment in the aerospace and defense springs market.

Missiles:

Missile systems are highly sophisticated applications that require precision-engineered components, including springs. Springs play a pivotal role in missile actuation systems, enabling functionalities such as guidance, control, and deployment mechanisms. The increasing geopolitical tensions globally have led to heightened investment in missile technology, thereby expanding the demand for high-performance springs in this sector. As missile systems evolve towards greater accuracy and speed, the need for innovative and reliable spring mechanisms becomes imperative. Manufacturers are responding to this demand by developing springs capable of withstanding high stresses and extreme conditions while maintaining operational efficiency, ensuring the reliability of missile systems.

Satellites:

In the aerospace sector, satellite applications require springs to provide reliable mechanisms for deployment and stabilization. Springs are crucial in satellite systems for various functions, including solar panel deployment, antenna positioning, and structural integrity during launch. The growing demand for satellite communication and Earth observation capabilities is driving investment in satellite technology, directly impacting the demand for aerospace springs. As miniaturization and mass production of satellites become more prevalent through initiatives such as CubeSats, the need for compact and high-performance spring solutions will continue to grow. Furthermore, advancements in materials used for spring manufacturing can lead to improved performance and reliability for satellite missions.

Launch Vehicles:

Launch vehicles, such as rockets and space launch systems, utilize springs in numerous critical applications, including stabilization and deployment mechanisms. These springs must be engineered to withstand extreme environments, including high pressure and temperature during launch and re-entry phases. The growing interest in space exploration and the commercialization of space are driving demand for advanced launch vehicle technology, consequently increasing the need for specialized spring solutions. As national space agencies and private companies ramp up their launch capabilities, the aerospace springs market is expected to witness substantial growth, particularly in the development of robust and lightweight springs that can enhance the performance of launch vehicles.

By Distribution Channel

OEM:

The Original Equipment Manufacturer (OEM) segment is a dominant channel in the distribution of aerospace and defense springs, as manufacturers often integrate these components directly into their products. OEMs require reliable and high-performance springs to ensure the safety and efficiency of their aircraft and defense systems. This channel is characterized by long-term contracts and partnerships between spring manufacturers and equipment producers, allowing for the seamless integration of springs into various applications. As the demand for innovative aerospace solutions continues to rise, OEM partnerships are expected to strengthen, further solidifying the position of the OEM segment in the aerospace springs market.

Aftermarket:

The aftermarket segment plays a significant role in the Aerospace and Defense Springs market, catering to the maintenance, repair, and overhaul (MRO) needs of existing aircraft and defense systems. As the global fleet of aircraft ages and requires regular maintenance, the aftermarket for springs is anticipated to grow in tandem with the increasing need for spare parts and replacements. This segment is characterized by a diverse range of clients, including airlines, military operators, and repair facilities, all of which require high-quality springs to ensure the continued performance and safety of their systems. The trend towards extending the operational lifespan of aircraft through maintenance and refurbishment will further bolster the aftermarket demand for aerospace springs.

By Material Type

Titanium Alloys:

Titanium alloys are increasingly favored in the aerospace and defense springs market due to their exceptional strength-to-weight ratio and corrosion resistance. These materials are particularly useful in applications where weight reduction is a priority, such as in aircraft and missile systems. The ability of titanium alloys to perform well under extreme temperatures and stresses makes them ideal for critical components in the aerospace sector. As manufacturers focus on enhancing the performance of their systems, the demand for titanium alloy springs is expected to rise, driven by advancements in manufacturing techniques that allow for more efficient production processes and improved material properties.

Stainless Steel:

Stainless steel remains one of the most commonly used materials in the aerospace and defense springs market, due to its excellent mechanical properties and resistance to rust and corrosion. This material is especially suitable for applications requiring durability and strength, such as landing gear and control systems in aircraft. Manufacturers often choose stainless steel for its cost-effectiveness and availability in various grades, allowing for tailored solutions based on specific application requirements. As the aerospace industry continues to demand high-performance materials, stainless steel springs will remain a staple, particularly in environments where corrosion resistance is critical for operational safety.

Inconel:

Inconel, a high-performance nickel-chromium alloy, is utilized in aerospace and defense springs where high-temperature and corrosion resistance are paramount. This material is commonly used in applications such as engine components and exhaust systems, where extreme conditions are prevalent. The ability of Inconel springs to maintain mechanical integrity under high stress and temperature makes them invaluable in aerospace applications. Furthermore, as the aerospace industry continues to innovate and push the boundaries of performance, the demand for Inconel springs is anticipated to grow, driven by the need for materials that can withstand the rigors of modern aviation and defense technologies.

Aluminum Alloys:

Aluminum alloys are gaining traction in the aerospace and defense springs market due to their lightweight properties and decent strength. These materials are particularly advantageous in applications where weight savings are critical, helping to improve fuel efficiency in aircraft. The use of aluminum alloys allows for greater design flexibility while ensuring high performance in various spring applications. As the aerospace industry increasingly prioritizes weight reduction and energy efficiency, the demand for aluminum alloy springs is expected to rise, particularly in commercial aviation and satellite applications where minimizing weight is essential.

Nickel Alloys:

Nickel alloys are known for their excellent resistance to corrosion and high-temperature capabilities, making them suitable for aerospace and defense applications that experience harsh environments. These alloys are often used in demanding applications such as turbine engines, where reliability and performance are crucial. The growing trend of advanced propulsion systems in aircraft and missiles is likely to drive the demand for nickel alloy springs, as manufacturers seek durable and high-performance materials that can withstand extreme operational conditions. As the aerospace and defense sectors continue to evolve, the utilization of nickel alloys in spring manufacturing is expected to expand significantly.

By Region

The Aerospace and Defense Springs market is characterized by distinct regional dynamics, influenced by factors such as industrial capability, government spending on defense, and the presence of major aerospace manufacturers. North America holds a dominant position in the market, driven by the presence of leading aerospace companies and substantial defense budgets, particularly in the United States. The region is expected to witness considerable growth, with the market projected to reach approximately $2 billion by 2035. Furthermore, the CAGR for North America is anticipated to be around 5% during the forecast period, attributed to ongoing advancements in aerospace technology and increased military expenditure.

Europe represents another significant market for Aerospace and Defense Springs, with countries such as Germany, the UK, and France being major contributors to the industry. The region is expected to account for approximately 30% of the global market share, amounting to around $1.5 billion by 2035. The focus on enhancing defense capabilities and the increasing demand for commercial aircraft are driving growth in this region. In Asia Pacific, emerging economies, particularly China and India, are witnessing substantial investments in aerospace and defense, which are expected to propel the demand for springs over the coming years. Overall, the regional analysis indicates that while North America and Europe remain strongholds, Asia Pacific is poised for rapid growth, fueled by increased industrial activity and rising defense budgets.

Opportunities

The Aerospace and Defense Springs market is poised for significant opportunities as the industry continues to innovate and evolve. One of the foremost opportunities lies in the development of advanced materials and manufacturing technologies. As manufacturers explore lightweight and high-performance materials to improve aircraft efficiency and reduce operational costs, the demand for innovative spring designs will increase. This trend is particularly evident in the aerospace sector, where the integration of smart materials and additive manufacturing techniques is becoming more common. These advancements will not only enhance the performance of springs but also enable more complex designs that can cater to specific application requirements, opening new avenues for growth and innovation.

Another opportunity exists in the growing emphasis on sustainability and environmental considerations within the aerospace and defense industries. As new regulations and standards emerge, manufacturers are increasingly required to adopt eco-friendly practices and materials. This shift creates avenues for companies to position themselves as leaders in sustainable manufacturing by developing springs that are not only high-performing but also environmentally friendly. Additionally, as defense budgets continue to rise globally, particularly in emerging economies, there are ample opportunities for market players to expand their presence and establish partnerships within new markets. Overall, the combination of technological advancements and the push for sustainability presents a promising landscape for growth in the Aerospace and Defense Springs market.

Threats

The Aerospace and Defense Springs market faces several threats that could impact its growth trajectory. One significant challenge is the volatility in raw material costs, particularly for high-performance alloys and specialized materials. Fluctuations in commodity prices can strain profit margins for manufacturers, impacting their ability to invest in research and development. Additionally, the aerospace industry is subject to stringent regulatory requirements and standards, which can complicate the manufacturing process and lead to increased operational costs. Failure to comply with these regulations can result in severe financial penalties and damage to a company's reputation. Furthermore, geopolitical tensions and economic uncertainties could disrupt supply chains and create instability in the global market, posing risks for companies operating within the aerospace and defense sectors.

Another potential restraint is the growing trend of automation and technological advancements in manufacturing, which may shift the competitive landscape. As more manufacturers adopt automated production processes and advanced technologies, companies that fail to keep pace with these developments may find themselves at a disadvantage. The need for skilled labor to operate and maintain advanced manufacturing systems is also a growing concern, as the industry faces a talent shortage in engineering and technical roles. Ultimately, the combination of external market pressures and internal operational challenges could hinder growth in the Aerospace and Defense Springs market, necessitating a proactive approach from industry players to navigate these issues effectively.

Competitor Outlook

• Spring Manufacturers, Inc.
• Hochland Springs
• Acme Springs
• John D. Hollingsworth on Wheels, LLC
• Engineering Springs
• MW Industries, Inc.
• American Spring Wire Corporation
• Parker Hannifin Corporation
• Associated Spring Raymond
• Lee Spring Company
• W.B. Jones Spring Company
• G. E. Smith Company
• Alco Spring Manufacturing Company
• Smalley Steel Ring Company
• Century Spring Corp.

The competitive landscape of the Aerospace and Defense Springs market is characterized by a diverse array of players ranging from specialized manufacturers to large multinational corporations. The industry features a mixture of well-established companies with significant market shares and newer entrants that bring innovative solutions to the market. Major players are focusing on expanding their product offerings and enhancing their capabilities through strategic partnerships, acquisitions, and investments in research and development. This competitive dynamic is propelled by the ongoing demand for high-performance, lightweight solutions that meet the rigorous standards of the aerospace and defense industries.

Companies are increasingly investing in advanced manufacturing technologies and innovative materials to stay ahead in the competition. For instance, some players are adopting additive manufacturing techniques to produce complex spring designs that would be challenging to create using traditional methods. This shift allows for greater design flexibility and the potential for significant weight reductions, aligning with industry trends toward efficiency and sustainability. Additionally, players are focusing on enhancing their supply chain management to mitigate risks associated with material shortages and fluctuating prices, ensuring that they can meet customer demands without compromising quality.

Notable companies such as Parker Hannifin Corporation and MW Industries, Inc. have made considerable strides in expanding their technological capabilities and market reach. Parker Hannifin, known for its expertise in motion and control technologies, has invested heavily in research and development to create innovative spring solutions tailored to aerospace applications. Meanwhile, MW Industries has cultivated a strong reputation for delivering custom spring solutions that cater to a variety of industries, including aerospace and defense. Through these strategic initiatives, major players are positioning themselves for long-term success in the evolving Aerospace and Defense Springs market.

• 1 Appendix

  • 1.1 List of Tables
  • 1.2 List of Figures

• 2 Introduction

  • 2.1 Market Definition
  • 2.2 Scope of the Report
  • 2.3 Study Assumptions
  • 2.4 Base Currency & Forecast Periods

• 3 Market Dynamics

  • 3.1 Market Growth Factors
  • 3.2 Economic & Global Events
  • 3.3 Innovation Trends
  • 3.4 Supply Chain Analysis

• 4 Consumer Behavior

  • 4.1 Market Trends
  • 4.2 Pricing Analysis
  • 4.3 Buyer Insights

• 5 Key Player Profiles

  • 5.1 Acme Springs
    • 5.1.1 Business Overview
    • 5.1.2 Products & Services
    • 5.1.3 Financials
    • 5.1.4 Recent Developments
    • 5.1.5 SWOT Analysis
  • 5.2 Hochland Springs
    • 5.2.1 Business Overview
    • 5.2.2 Products & Services
    • 5.2.3 Financials
    • 5.2.4 Recent Developments
    • 5.2.5 SWOT Analysis
  • 5.3 Lee Spring Company
    • 5.3.1 Business Overview
    • 5.3.2 Products & Services
    • 5.3.3 Financials
    • 5.3.4 Recent Developments
    • 5.3.5 SWOT Analysis
  • 5.4 Engineering Springs
    • 5.4.1 Business Overview
    • 5.4.2 Products & Services
    • 5.4.3 Financials
    • 5.4.4 Recent Developments
    • 5.4.5 SWOT Analysis
  • 5.5 G. E. Smith Company
    • 5.5.1 Business Overview
    • 5.5.2 Products & Services
    • 5.5.3 Financials
    • 5.5.4 Recent Developments
    • 5.5.5 SWOT Analysis
  • 5.6 MW Industries, Inc.
    • 5.6.1 Business Overview
    • 5.6.2 Products & Services
    • 5.6.3 Financials
    • 5.6.4 Recent Developments
    • 5.6.5 SWOT Analysis
  • 5.7 Century Spring Corp.
    • 5.7.1 Business Overview
    • 5.7.2 Products & Services
    • 5.7.3 Financials
    • 5.7.4 Recent Developments
    • 5.7.5 SWOT Analysis
  • 5.8 Associated Spring Raymond
    • 5.8.1 Business Overview
    • 5.8.2 Products & Services
    • 5.8.3 Financials
    • 5.8.4 Recent Developments
    • 5.8.5 SWOT Analysis
  • 5.9 W.B. Jones Spring Company
    • 5.9.1 Business Overview
    • 5.9.2 Products & Services
    • 5.9.3 Financials
    • 5.9.4 Recent Developments
    • 5.9.5 SWOT Analysis
  • 5.10 Smalley Steel Ring Company
    • 5.10.1 Business Overview
    • 5.10.2 Products & Services
    • 5.10.3 Financials
    • 5.10.4 Recent Developments
    • 5.10.5 SWOT Analysis
  • 5.11 Spring Manufacturers, Inc.
    • 5.11.1 Business Overview
    • 5.11.2 Products & Services
    • 5.11.3 Financials
    • 5.11.4 Recent Developments
    • 5.11.5 SWOT Analysis
  • 5.12 Parker Hannifin Corporation
    • 5.12.1 Business Overview
    • 5.12.2 Products & Services
    • 5.12.3 Financials
    • 5.12.4 Recent Developments
    • 5.12.5 SWOT Analysis
  • 5.13 American Spring Wire Corporation
    • 5.13.1 Business Overview
    • 5.13.2 Products & Services
    • 5.13.3 Financials
    • 5.13.4 Recent Developments
    • 5.13.5 SWOT Analysis
  • 5.14 Alco Spring Manufacturing Company
    • 5.14.1 Business Overview
    • 5.14.2 Products & Services
    • 5.14.3 Financials
    • 5.14.4 Recent Developments
    • 5.14.5 SWOT Analysis
  • 5.15 John D. Hollingsworth on Wheels, LLC
    • 5.15.1 Business Overview
    • 5.15.2 Products & Services
    • 5.15.3 Financials
    • 5.15.4 Recent Developments
    • 5.15.5 SWOT Analysis

• 6 Market Segmentation

  • 6.1 Aerospace and Defense Springs Market, By Application
    • 6.1.1 Aircraft
    • 6.1.2 Defense Vehicles
    • 6.1.3 Missiles
    • 6.1.4 Satellites
    • 6.1.5 Launch Vehicles
  • 6.2 Aerospace and Defense Springs Market, By Product Type
    • 6.2.1 Compression Springs
    • 6.2.2 Extension Springs
    • 6.2.3 Torsion Springs
    • 6.2.4 Constant Force Springs
    • 6.2.5 Belleville Springs
  • 6.3 Aerospace and Defense Springs Market, By Material Type
    • 6.3.1 Titanium Alloys
    • 6.3.2 Stainless Steel
    • 6.3.3 Inconel
    • 6.3.4 Aluminum Alloys
    • 6.3.5 Nickel Alloys

• 7 Competitive Analysis

  • 7.1 Key Player Comparison
  • 7.2 Market Share Analysis
  • 7.3 Investment Trends
  • 7.4 SWOT Analysis

• 8 Research Methodology

  • 8.1 Analysis Design
  • 8.2 Research Phases
  • 8.3 Study Timeline

• 9 Future Market Outlook

  • 9.1 Growth Forecast
  • 9.2 Market Evolution

• 10 Geographical Overview

  • 10.1 Europe - Market Analysis
    • 10.1.1 By Country
      • 10.1.1.1 UK
      • 10.1.1.2 France
      • 10.1.1.3 Germany
      • 10.1.1.4 Spain
      • 10.1.1.5 Italy
  • 10.2 Asia Pacific - Market Analysis
    • 10.2.1 By Country
      • 10.2.1.1 India
      • 10.2.1.2 China
      • 10.2.1.3 Japan
      • 10.2.1.4 South Korea
  • 10.3 Latin America - Market Analysis
    • 10.3.1 By Country
      • 10.3.1.1 Brazil
      • 10.3.1.2 Argentina
      • 10.3.1.3 Mexico
  • 10.4 North America - Market Analysis
    • 10.4.1 By Country
      • 10.4.1.1 USA
      • 10.4.1.2 Canada
  • 10.5 Middle East & Africa - Market Analysis
    • 10.5.1 By Country
      • 10.5.1.1 Middle East
      • 10.5.1.2 Africa
  • 10.6 Aerospace and Defense Springs Market by Region

• 11 Global Economic Factors

  • 11.1 Inflation Impact
  • 11.2 Trade Policies

• 12 Technology & Innovation

  • 12.1 Emerging Technologies
  • 12.2 AI & Digital Trends
  • 12.3 Patent Research

• 13 Investment & Market Growth

  • 13.1 Funding Trends
  • 13.2 Future Market Projections

• 14 Market Overview & Key Insights

  • 14.1 Executive Summary
  • 14.2 Key Trends
  • 14.3 Market Challenges
  • 14.4 Regulatory Landscape

Segments Analyzed in the Report

The global Aerospace and Defense Springs market is categorized based on

By Product Type

• Compression Springs
• Extension Springs
• Torsion Springs
• Constant Force Springs
• Belleville Springs

By Application

• Aircraft
• Defense Vehicles
• Missiles
• Satellites
• Launch Vehicles

By Material Type

• Titanium Alloys
• Stainless Steel
• Inconel
• Aluminum Alloys
• Nickel Alloys

By Region

• North America
• Europe
• Asia Pacific
• Latin America
• Middle East & Africa

Key Players

• Spring Manufacturers, Inc.
• Hochland Springs
• Acme Springs
• John D. Hollingsworth on Wheels, LLC
• Engineering Springs
• MW Industries, Inc.
• American Spring Wire Corporation
• Parker Hannifin Corporation
• Associated Spring Raymond
• Lee Spring Company
• W.B. Jones Spring Company
• G. E. Smith Company
• Alco Spring Manufacturing Company
• Smalley Steel Ring Company
• Century Spring Corp.