About

About Stewart EFI, LLC Stewart EFI LLC manufactures highly engineered progressive die and deep-drawn metal stampings, and slide-formed components. Significant savings can be realized when we convert your new and existing components to stampings from other more costly processes. In-house design and tool building, prototyping, plus additional services are offered, including finishing and plating. We serve the medical, automotive, defense/military, battery/electronics, consumer, and industrial markets plus others. Stewart EFI is one of the largest international suppliers offering precision progressive die, deep drawn and slide-formed metal stampings, secondary machining and automated assembly operations. Stewart EFI is headquartered in Thomaston, CT, and has additional manufacturing facilities in El Paso, TX, as well as a joint venture in Hangzhou, China. Stewart EFI is one of the largest international suppliers offering precision progressive die, deep drawn and slide-formed metal stampings, secondary machining and automated assembly operations. Stewart EFI is headquartered in Thomaston, CT, and has additional manufacturing facilities in El Paso, TX, as well as a joint venture in Hangzhou, China.