The American Caliper Co. Center Gage 60 Degree Fishtail - vintage tempered USA For Sale
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The American Caliper Co. Center Gage 60 Degree Fishtail - vintage tempered USA: $20.00
This is a vintage American Caliper Co. 60-degree center gauge, also known as a fish-tail gauge, used by machinists. It is made in the USA from spring-tempered steel. The gauge is used to grind and set screw-cutting tools and to determine the number of threads per inch. It features a table listing the double depths of threads for various pitches. The sides are graduated in 14ths, 20ths, 24ths, and 32nds of an inch.