This Pratt & Whitney Co. Hartford USA 1919 A.M. Standard Thread Gage Tool is a valuable addition to any collection of machining tools and hardware. Made in the United States, this tool features a 1/8”-27 thread size and is in compliance with California Prop 65 Warning regulations. It is a unique and collectible item, perfect for those interested in vintage tools and hardware. The brand is well known in the industry for producing high-quality tools, and this thread gage tool is no exception. Add it to your collection today!