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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  150A |
DIN 376 - 374 - 5156  |
COATING  |
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 ≤ 5 x d1  |
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| Machine tap with spiral point, fluteless tap, driving the chips ahead. Chamfer lead 4-5 threads (DIN-Form B). Rake angle 15º÷17º measured in the 3rd thread. |
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