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Thread: Tap/ Drill Sizes

  1. #1
    blown428fe
    1/4-20 IS A #7 , I think. 5/16-18 is what? Thanks.

  2. #2
    Nucking futs
    5/16= drill F decimal .2570

  3. #3
    GofastRacer
    Here's two of many sites with all the info!..
    EngineersEdge! (http://www.engineersedge.com/tap_drill_chart.htm)
    NewmanTools! (http://www.newmantools.com/tapdrill.htm)

  4. #4
    blown428fe
    Thank you.

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