Starrett Decimal Equivalents Screw Thread Card 1950s Machinist Tool Metal For Sale

A vintage Starrett decimal equivalents and screw thread card, a helpful pocket reference, awaits a new owner. Dating to the 1950s, this card offers a wealth of information for machinists, tool and die makers, and anyone interested in precision measurement.This compact, informative card is a product of the L.S. Starrett Company, known as "World's Greatest Toolmakers" and purveyors of mechanics' hand measuring tools, precision instruments, dial indicators, steel tapes, hacksaws, band saws, band knives, and precision ground flat stock. The front side presents a comprehensive table of decimal equivalents, covering fractions from 1/64 to 1, displayed in clear, easy-to-read red text.The reverse side provides essential data for screw threads and tap drill sizes, including information on N.C. (National Coarse) or A.S.M.E. Special Machine Screws, N.F. (National Fine) or A.S.M.E. Standard Machine Screws, American Standard Taper Pipe Thread, and N.F. or S.A.E. Standard Screws. It also indicates that top drills allow approximately 75% full thread, a crucial detail for accurate machining. The Starrett trademark is prominently displayed. This helpful tool originated in Athol, Massachusetts, U.S.A., in Worcester County.Crafted from what appears to be cardboard or coated cardstock, this Starrett reference tool has survived the years in good vintage condition. There may be minor wear and light discoloration consistent with its age. Any wear, creases, or other signs of age can be seen in the accompanying photographs, so please examine them carefully. This card would be a great addition to any collection of vintage machinist tools or a useful piece of shop ephemera.