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In 1963, Wheatland Tube eliminates the "tong and bell" method of manufacturing pipe, used since 1930, and installs a new Aetna Standard Mill. Wheatland's new Aetna Continuous Weld Mill expands the company's capacity to produce new product. Rigid conduit is introduced, adding to the "bread and butter" standard pipe. By the late 60's, the success of Wheatland's conduit sales prompts management to consider a companion product to rigid conduit, a thinner wall tubular product known as Electrical Metallic Tubing, or EMT. In 1969, JMC acquires the assets of International Conduit Company (ICC) a Chicago, Illinois based independent manufacturer of EMT. These assets include an electric resistance weld (ERW) tube mill and EMT finishing line on Chicago's South Western Boulevard. 1970's - Within a year of purchase Wheatland Tube Company Chicago Division establishes itself as a producer of high quality EMT. In 1975, Wheatland extends the product line to include the manufacture of couplings and fittings. Seminole Tubular Products, a sister company of Wheatland, satisfies the market need for nipples, elbows and other threaded fittings.