H is equal to insert nominal length +1 Pitch. Look up the desired pitch and thread percentage to find the corresponding outer diameter. P Pitch, mm, or threads per inch (t.p.i. Shown below (Dimension H) are the MINIMUM for countersunk holes and insert set-down of 1-1/2 The tap and drill chart below is for Metric threads. The top surface joining the two sides, or flanks.
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