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 2-3 Power class W For soft materials with a strength > Rm 500 N/mm2, such as aluminium, magnesium alloys, some non-ferrous metals or thermoplasts. Length of taper lead: M2: 2.5 x P M2.5...M16: 4 x P Hole Type: through holes. Designs: M2: W320-3, reinforced shaft, DIN 371 M2.5...M6: W320-4, reinforced shaft, DIN 371 M8...M16: W420-4, falling through shaft, DIN 376
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