Inside Greenfield Tap And Die: America's Thread Empire

In January 1943, the Greenfield Tap & Die Corporation employed 3,558 people running three shifts, seven days a week, in a Massachusetts town of roughly fifteen thousand. Anti-aircraft batteries sat in the hills above the plant, and guns were mounted on the roof of a competitor's factory across town. There was no shipyard in Greenfield and no arsenal. What the guns protected was the ability to cut a screw thread to a standard the rest of American industry could measure itself against. This documentary traces that company from a single patent in 1871 to a liquidation auction in August 2025. It begins with John J. Grant, a machinist born in Leicester, England, who arrived in Greenfield in 1870 with an idea about threads. At the time, most American threads were not cut at all. They were crushed, forced through a hardened plate that displaced the metal into a rough helix, producing fasteners that stripped, seized, and fit exactly one hole. Grant's adjustable die sliced the thread instead. He patented it on October 24, 1871, could not raise the capital to scale it, sold it, and left for Hartford to build the same business for Pratt & Whitney. The buyers, Solon L. Wiley and Charles P. Russell, founded Wiley & Russell in 1872 in the abandoned John Russell cutlery building on the Green River. Within two years, two of their own workers, the brothers Frederick and Frank Wells, walked out to compete against them. Their shop burned around 1876. Working from a borrowed foundry while they rebuilt, the Wells brothers developed their own adjustable die and the Little Giant brand. The two rivals were merged on April 2, 1912, by a Boston financier named Frederick H. Payne, who had quietly taken control of Wiley & Russell stock and later served as Assistant Secretary of War. Greenfield Tap & Die became the first publicly traded business in Franklin County history. The video covers the manufacturing in detail: the forge shop, hardening, the machine-relieved tap process, thread and flute grinding, hand lapping, and the gage room, where toolmaker Randolph Suhl ground gages to three ten-thousandths of an inch as routine work. It covers the federally financed gage plant of 1940, where temperature and humidity were held within one percent, and GTD's output of roughly a third of the world's gages, the standards that made interchangeable wartime manufacturing possible. It also covers what the shareholders brought with them. Time-study men in white coats stood behind master machinists with stopwatches to justify holding down piece rates. In June 1941, six months before Pearl Harbor, the workforce voted nearly two to one to join the United Electrical, Radio and Machine Workers of America as Local 274. During the Red Scare, priests picketed and churches bought full-page advertisements against the union, and on January 24, 1950, the members voted 396 to 332 to keep it anyway. In April 1952, more than a thousand workers took a strike vote at the Garden Theater beneath a marquee advertising the film At Sword's Point, and voted not to strike. The following year they did, after greasing their machines on the way out. They were gone eleven days and came back with a raise. The final third traces the decline: the 1958 merger into United-Greenfield, the 1968 TRW acquisition, the Harbour Group years, the 1992 abandonment of Plant One and the barium, chromium, lead and PCB contamination left in the soil, the 1997 Kennametal acquisition valued near one billion dollars, the three-day strike of August 2019, and the closure announced in January 2025 for roughly fifteen million dollars in annualized savings. Manufacturing ceased on April 15, 2025. The machinery was auctioned on August 7. Subscribe to Trade Archive for weekly documentaries on the companies, tools and machines that built the physical world. SOURCES Coss, Ian, and Tom Goldscheider. At Sword's Point. Radio documentary. Springfield, MA: New England Public Media, 2024. Ducharme, Rebecca. "Greenfield Tap & Die." Historical Journal of Massachusetts 34, no. 2 (Summer 2006). Greenfield Recorder. "Kennametal Closing Greenfield Plant." January 15, 2025. Greenfield Recorder. "Laid-Off Kennametal Employees Ponder What's Next." April 16, 2025. Kennametal Inc. Acquisition of Greenfield Industries. Press release and SEC filing, October 1997. Kennametal Inc. Fourth Quarter and Full Year Fiscal 2025 Results. Press release, August 6, 2025. Museum of Our Industrial Heritage. "Greenfield Tap & Die," "John Grant Patent #120266," "Wells Brothers & Company," "Wiley & Russell," and "Gage Room." Greenfield, MA. Perfection Global. Kennametal Greenfield, MA Plant Closure Auction. August 7, 2025. United Electrical, Radio and Machine Workers of America. UE News coverage of Local 274, 2019 and 2024. U.S. Patent Office. Improvement in Dies for Cutting Screw-Threads. Patent No. 120,266, granted October 24, 1871.