A USA Based manufacturer of industrial custom and stock springs since 1939, Diamond continues to hold fast to its founding principles of providing quality springs with a strong emphasis on personalized customer service across our three manufacturing plants, and stock spring Catalog Division.
Custom Marine
CMI Industrial specializes in SS, Inconel and other materials, forming and fabricating tube assemblies for a variety of applications and Industries. We offer full-scale production of aeroderivative gas turbine components, with a growing focus on GE LM6000 platforms and similar industrial aero units. Our vertically integrated fabrication, machining, and inspection capabilities allow us to deliver consistently repeatable, tight-tolerance parts that meet or exceed OEM and Tier-1 standards.
CSC Radiator
Manufacturer of high-quality Radiators, Oil Coolers, HVAC Coils and other cooling solutions.
Cortec Global Services
Energy. Renewables. Shipping. Extend the lifetime of your material assets with customized protection and corrosion solutions. Extending the lifetime of material assets is good for business and good for the globe.
Central Power Systems & Services
Central Power Systems & Services has earned the trust of data centers of all sizes by delivering dependable power solutions for both new construction and expansion projects. We work alongside consulting engineers and building contractors to support your project from planning through completion. With a large inventory of equipment from leading manufacturers, we make it easy to find the right model to fit your application and budget. From exploring new gas deposits to producing finished goods, custom power solutions are essential to success. Through our PowerForce custom manufacturing services, we design, manufacture, and service power generation systems built for efficient, reliable performance in any environment—whether in the desert, along the coast, or deep in mountainous terrain.
C.E. Niehoff
C.E. Niehoff & Co. is the leader in the design and manufacture of heavy-duty advanced alternators and charging solutions. Our products include high output alternators that range from 12V – 375 volts with power output up to 30kW. Additional products include battery equalizers, battery isolators, DC/DC converters, and smart charging accessories. Customization capabilities include high voltage, PTO driven, and custom mounting configurations. CEN smart technology software can provide complex integrated solutions to communicate with vehicle J1939 CAN Bus systems with customized commands. Additional features of parallel operation configurations utilize dynamic load balance and patented Lithium Ion (Li-Ion) charging algorithms. | C.E. Niehoff & Co. is a privately held, employee-owned American company that has become a leader in the design and manufacture of heavy-duty alternators and power-management devices. All of our products are designed in-house and proudly manufactured on our campus in Evanston, Illinois. We look forward to the opportunity to serve you with the same philosophy and commitment to quality which has become the foundation of our business. | C.E. Niehoff & Co. is the leader in the design and manufacture of heavy-duty advanced alternator power and charging solutions. Our products include high output alternators that range from 12V – 375 volts with power output up to 30kW. Additional products include battery equalizers, battery isolators, DC/DC converters, and smart charging accessories. Customization capabilities include high voltage (56v), PTO driven, and custom mounting configurations. CEN smart technology software can provide complex integrated solutions to communicate with vehicle J1939 CAN Bus systems with customized commands. Additional features of parallel operation configurations utilize dynamic load balance and patented Lithium Ion (Li-Ion) charging algorithms. | C.E. Niehoff & Co. (CEN) is a privately held employee-owned American company founded in 1923 that specializes in designing and manufacturing heavy-duty, high output alternators and power management devices. As an ISO 9001:2015 certified facility, we are committed to quality, integrity and excellence, while striving to exceed customer expectations through innovation and collaboration.
API Heat Transfer
API Heat Transfer has successfully established itself as the market leader in innovative and energy efficient equipment. Our 140-year heritage includes a family of 5 brands and has been dedicated to designing and delivering world-class high-performance heat transfer products for almost every industry. Our reputation is bolstered by our worldwide network of manufacturing facilities and more than 1,600 employees who provide sales, service, and support. Our process is ingrained in our culture and has served customers around the world for nearly a century and a half. Upon working with us, you’ll find our performance sets us apart. API Heat Transfer utilizes a customer-focused approach to deliver highly engineered heat transfer solutions. | General ThermoDynamics and Airtech focus on custom engineered heat exchanger systems for industrial and energy applications. Engineers turn to us for unique system-level thermal management challenges—where off-the-shelf products are insufficient. In addition, we also specialize in air cooled heat exchangers for high-demand applications in oil & gas, energy and heavy equipment applications. Engineers choose our solutions for robust designs capable of handling harsh duty cycles, extreme ambient temperatures, and variable loads. Basco designs and manufactures shell & tube heat exchangers—both custom-engineered and standard units. Basco delivers reliable thermal transfer performance backed by decades of application data across industrial plants, chemical processes, and power generation systems. The portfolio includes straight tube, U-tube, and custom bundles designed to meet ASME, TEMA, and API standards, giving engineers confidence in fit, performance, and long-term serviceability.
Accurate Perforating
Accurate Perforating has high-speed equipment and over 80 years of metal fabrication experience, including 25 years of expertise as a supplier for HVAC metal-perforated components. This includes silencers, filtration media holders, and our newest product line, 5.394″ spiral perforated coil. We are headquartered in Chicago, IL, and ship across North America. Our sheet metal fabrication shop offers additional capabilities. | Since 1942, Accurate Perforating has grown from a small machine shop into a 210,000-sq. ft. full-service perforated sheet metal supplier offering complete perforating, fabricating, and finishing solutions. Whether you need perforated aluminum, carbon steel, galvanized, stainless steel, brass, or copper in perforated sheets, coils, blanks, parts, finished components, or architectural metal, decorative metal, railings, facades, or sunscreens — with the broadest range of thickness, hole size, or pattern — we’re the perforated sheet manufacturer you can trust. We specialize in custom and complex work. Made in Chicago. | Custom Sheet Metal Solutions Tailored to Your Needs Accurate Metal Fabricating is a high-volume METAL FABRICATION company that serves clients across North America. With a state-of-the-art facility centrally located in the Chicagoland area and unmatched expertise, find out why Accurate has earned a stellar reputation in the metal manufacturing industry. Accurate sets the bar for high-volume Chicago sheet metal fabricators. We see your projects through from start to finish.