Screw Pitch Combination Gauge 52 Blades Screw pitch combination measuring gauge. Designed to determining the gradient for external and internal threads. Useful for checking tool angle while cutting threads in metal turning lathes. The angles on the thread cutting tool is checked on the V slots in the gauge. Measuring range Metric: 0.25 - 6.0mm and Imperial: 4 - 62 BSW. Blades individually stamped with accurately formed thread profiles. Tool length: 65mm. For use in the automotive and engineering industry. Other tools available in our shop. Specifications: Material: steel Accuracy: ±0.07mm Folded length: 65mm Width: 18mm Measuring Range: Metric 0.25-6.0 mm: 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, 0.6, 0.7, 0.75, 0.8, 0.9, 1, 1.25, 1.5, 1.75, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6mm Imperial 4-62TPI: 4, 4 1/2, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16, 18, 19, 20, 22, 24, 25, 26, 28, 30, 32, 36, 40, 48, 60, 62TPI