straight grooves, progressive tap, HSS-E, TiN coating, metric ISO-thread, right thread, Tolerance field ISO2 / 6H, forme of taper lead B (3.5-5.5 x P), cylinder shank with square piece, number of teeth 2-3 Power class N For long-chipping materials with a tensile strength of Rm > 350...1000 N/mm2. Length of taper lead: M2: 2.5 x P M2.5...M10: 4 x P Hole Type: through holes. Designs: M2: N320TN-3, reinforced shaft, DIN 371, Teeth:2 M2.5...M10: N320TN-4, reinforced shaft, DIN 371, Teeth:3
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