Kromhard Twist Drill Company Straight Thread Pitch Gauge
Three Tools Measure Most Standard World-Wide Threads
Straight gauges in three size ranges and thread styles. All steel. Precision cut threads for accurate measuring. Sizes permanently stamped into each leaf. Mfg: Kromhard Twist Drill Company SPECS: English - 28 blades, 4 to 80 tpi; Metric - 24 blades, 60deg; British (BSW) - 28 blades, 55deg.