We’re here for you. So, here you’ll find great brands and tons of products that meet your needs. You’ll also find folks who go that extra mile to bring them to you.

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As you grow, NSI grows with you. We’re committed to being your easy-to-do-business-with partner in manufacturing. We challenge the status quo with easier installation, better performance and better price. Succeed together, with NSI.  


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The NSI family of brands are your reliable partners in Electrical, HVAC and Network Infrastructure. We carry a full line of professional-grade products and supplies to handle any installation.

Our Brands


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The maker of the original pre-insulated connector not only manufactures connectors and high-quality aluminum & copper set screws.

For the utility, OEM, commercial and industrial markets, our engineers innovate & certify connectors that meet emerging demands.




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With over 2500 cable & conduit fittings, bodies, bushings, and more, we’re sure to have the perfect solution to meet your needs.

Whether you’re serving the residential, commercial, light industrial, or renewable energy industry.

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Since 1963, Remke Industries has offered industry professionals the widest selection of metallic and non-metallic cable grips and cord connectors.

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With today’s busy lifestyles, customers demand products that provide convenience.

TORK switches, timers, and photo-control products are designed with that in mind.

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Using high-quality fasteners and anchors helps your installation projects excel.

Metallics designs and manufactures our products in the U.S. for guaranteed quality.

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Technician-focused innovation for over 75 years, with an extensive offering of HVACR and Appliance parts, components and tools.

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TradeFox® is SUPCO’s exclusive brand of innovative products, invented by real technicians and designed to make life in the HVACR trade easier.

We use our expertise in engineering, manufacturing, marketing and distribution to help technicians bring their ideas to life and to market.

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Duro Dyne

Duro Dyne, the greatest name in sheet metal necessities offers an extensive line of HVAC products from flexible duct connectors to fire dampers.

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Platinum Tools

Platinum Tools has sold an innovative range of high-quality tools to prepare, install, terminate and test wire and cable since 1997.

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LYNN has served networking and FTTx solutions to datacom and broadband distributors with integrity, quality and excellent service since 1964. 

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Why NSi?

We promise to be the folks who outwork the rest to make things happen for you. We’ll provide a clear path to new technologies and services so you work smarter and, of course, bring you all the great brands and products you need to succeed.

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Recent News & Insights


Ongoing Investment in American Manufacturing NSI has acquired Cast Products Inc. (CPI), a leading manufacturer of zinc die casting products based…

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Balance of system

It’s no secret that renewable energy is the future—and where there is future growth, there is opportunity. Solar energy continues…

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