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The 30° helical flute thread mills will cut internal and external threads. The helical flute distributes side cutting pressure.
30° Helical Flute - Metric
Stub Acme Internal SPTM Thread Mills
Metric Straight Flute Thread Mills - Solid Carbide - Full Profile
Acme Internal SPTM Thread Mills
Metric 15 degree Helical Flute Thread Mills - Solid Carbide - Full Profile
BSPP / BSPT Thread Mills - Straight Flute