Vintage L. S. STARRETT Screw Threads & Tap Drill Sizes Dial Chart Athol Mass USA

The Vintage L. S. Starrett Screw Threads & Tap Drill Sizes Dial Chart from 1943 is a rare collectible tool that provides essential information for machinists and engineers. Made in the United States, this 4 1/2″ wheel chart displays a comprehensive list of screw threads and tap drill sizes, making it a valuable reference for precision machining tasks. With the Starrett brand known for quality and reliability, this chart is a must-have for collectors and professionals alike.