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H. L. Electronics, Inc.
HB Plastics Division of HBP, Inc.
Habersham Metal Products
Harvey Pattern Works, Inc.
Hayes Manufacturing
Heads & Threads International, LLC (HTI)
Heartland Enterprises, Ltd.
Hi-Temp Insulation, Inc.
High Purity Standards
High Sierra Electronics, Inc.
Homeyer Tool & Die
Hoover Precision Products, Inc.
House of Packaging, Inc.
Hy-Tek Manufacturing Company, Inc.