IEH designs and manufactures Hyperboloid printed circuit board connectors for electrical connections in high-stress environments. These connectors utilize a contact design where helically wound wires form a barrel-shaped contact to grip mating pins, providing higher reliability than conventional designs. IEH primarily serves the defense and commercial aerospace markets, with additional applications in the space, medical, and industrial sectors. Its connectors are used in mission-critical hardware, including missiles, avionics, engine control systems, and medical devices. IEH operates as a predominantly domestic manufacturer with facilities in New York and Pennsylvania. The company follows a project-based business model, producing small, customized batches through direct engineering collaboration with original equipment manufacturers. IEH sells its products directly and through independent distributors, maintaining a listing on the U.S. Defense Logistics Agency’s Qualified Products List to satisfy military contract requirements. The company's strategy focuses on deepening customer relationships through application-specific designs and expanding in-house machining to reduce reliance on foreign-sourced parts. Business performance is driven by U.S. defense procurement cycles and commercial aircraft production rates. Key operational costs include gold for connector plating and labor expenses.