Hudson Technologies (also known as JSJ HT Holdings, formerly known as Hudson Tool & Die) is a manufacturer of deep-drawn metal enclosures, stampings, and metal diaphragms. It offers battery enclosures, flat and corrugated metal diaphragms, precision-engineered critical components, cases, shields, half-shells, etc. The company caters to the aerospace, energy storage, medical devices, military and defense, oil and gas, and semiconductor industries.