straight grooves, progressive tap, HSS-E_PM, 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 3-4 Power class H For high-strength materials with a strength <900...1200 N/mm2, tempered steels, alloyed tool steels, hardened steels, some non-ferrous metals of special quality. Length of taper lead: 4 x P Hole Type: through holes. Designs: M2...M10: H320-4, reinforced shaft, DIN 371, Teeth:3 M12...M30: H420-4, falling through shaft, DIN 376, Teeth:4
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