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Threading Taps |
 Steels with good machinabilityRm < 750 N/mm² (101,500 PSI), Nodular graphite, Malleable cast iron |
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≈ DIN 371  L104A TL104A |
≈ DIN 376  L104 TL104 |
COATING   |
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  ≤ 3 x d1  |
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| Machine tap with spiral point, driving the chips ahead. Chamfer lead 4-5 threads (DIN-Form B). Rake angle 12º÷14º measured in the 3rd thread. |
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