Insize 4812-E, THREAD GAGE, 1-10TPI, 6928640319334

To check and set screw cutting tools.
Angle accuracy: ?10min.pe
Acme 29 Degree
1 – 10TPI, Pitch: 1, 1-1/3, 1-1/2, 1-3/4,2,2-1/2,3,4,5,6,7,8,9,10 TPI
Made of medium carbon steel