Specification corresponding with standard blanks(for Japanese market)

Material Symbols HSS:○ HSS-Co:● HSS-P:◎

Main size designation and specification
① metric② unified③ whitworth④ sewing screw⑤STI (metric)⑥STI (unified)
M16×2 M16×1.5 M16×1.25 M16×1 M16×0.75
M17×1.5STIM14×2STI9/16-18UNF
M17×1 M17×0.5
M17×1.5
M18×2.5 M18×2 M18×1.5 M18×1.25STIM16×1.5STI9/16-12UNC STI5/8-18UNF
M18×1STIM16×1
M18×0.75 M18×0.5
M18×2.5 M18×2 M18×1.5 M18×1.25
M19×2.5 M19×2 M19×1.53/4-10UNC 3/4-12UN 3/4-16UNF 3/4-20UNEFW3/4-10STIM16×2STI5/8-11UNC
M19×13/4-28UN 3/4-32UN
M19×2.5 M19×2 M19×1.5
M20×2.5 M20×2
M20×1.5STIM18×1.5
M20×1.25 M20×1
M20×2.5 M20×2 M20×1.5
M21×1.5
M21×1
M21×1.5
  • Corresponding pitches meet with the pitches of other kinds.
  • Concerning Hand of threads, both right and left are applicable in the same blank.
  • Concerning the kind of taps, SP, PO, HT, ROLL are applicable in the same blank.