IEH Corp is a high-reliability defense connector micro-cap with a protected hyperboloid technology moat, record backlog, recovering margins, and a valuation that has not yet fully priced in its turnaround.
Overview
IEH Corp is a niche manufacturer of high-reliability PCB connectors, custom interconnects, and hyperboloid contacts, with 88.4% of FY2026 sales tied to defense and commercial aerospace. Customers choose IEH for extreme-condition reliability, low insertion force, shock resistance, thermal tolerance, and 100% contact testing. Its products are embedded in mission-critical platforms, creating powerful switching costs and sole-source relationships. Despite its micro-cap scale, IEH serves global defense primes, aerospace OEMs, medical-device makers, space customers, and industrial users from facilities in Brooklyn and Allentown.