straight grooves, progressive tap, HSS-E_PM, VS-wear-protection layer, 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 Z For tough materials, such as stainless, acid- and heat-resistant steels with a breaking elongation over 30%. For minimal lubrication. Length of taper lead: 4 x P Hole Type: through holes. Designs: M3...M10: Z320VS-4, reinforced shaft, DIN 371 M12...M20: Z420VS-4, falling through shaft, DIN 376
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