National Institute of Standards and Technology NIST On the Measurement of Thread Measuring Wires
brating a 600 thread wire are outlined below for all USA standard 600 thread wires 290 Acme and Buttress thread measuring wires 1 Pitch TPI Measuring Force Cylinder Size Diame ter 20 or less lbs 750 inch Above 20 thru 1 0 750 Above 40 thru 125 Above