Screw Pitch Gauge in Metric and Thread Per Inch (tpi) (SAE) measurements Metric Sizes: 05mm, 06mm, 07mm, 075mm, 08mm, 09mm, 10mm, 125mm, 15mm, 175mm SAE - Threads per Inch: 12, 13, 14, 16, 18, 20, 24, 27, 28, 32, 36, 40 Keep gauges oiled slightly to allow easy selection
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