screw pitch gauge - top view opened
Screw Pitch Gauges quickly identify and measure V, Unified, American National 60° threads and Metric threads. Blades are clearly marked with thread size.
Screw Pitch Gauges page 249
ITEM NO. GAUGE RANGE
SPG-F 9 to 40 Fractional
SPG-M .45 to 2.5M Metric