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Drill America M20.2 x 0.45 High-Speed Steel 3 Flute Hand Tap Set
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Quickly and accurately determine the screws size Recommends the drill bit or tap size needed for the screw Standard & Metric Constructed of thick hard
Screw Thread Gauge | Metric and SAE | Recommends Drill Bit & Tap Size (BCP675)
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TAP DRILL CHART: RECOMMENDED DRILLS FOR TAP SIZES, PDF