Standard blank dimension table (for Japan)

Main size designation and specification
① metric② unified③ whitworth④ sewing screw⑤STI (metric)⑥STI (unified)
M2×0.4№1-64UNC №1-72UNFSM5/64-64
M2×0.25
M2.2×0.45№2-56UNC №2-64UNF
M2.2×0.25
M2.3×0.4
M2.3×0.25
M2.5×0.45W3/32-48SM3/32-56
M2.5×0.35
M2.6×0.45№3-48UNC №3-56UNF
M2.6×0.35
M3×0.5№4-40UNC №4-48UNFSTIM2.2×0.45STI№2-56UNC
M3×0.35
M3×0.6
M3.5×0.6№5-40UNF №5-44UNFW1/8-40SM1/8-40 SM1/8-44STIM2.5×0.45 STIM2.6×0.45
M3.5×0.35
M4×0.7 M4×0.75W5/32-32SM9/64-40STI№4-40UNC STI№5-40UNC
M4×0.5
STIM3×0.5
M4.5×0.75№8-32UNC №8-36UNFSM11/64-40STI№6-40UNF
M4.5×0.5STIM3.5×0.6
M5×0.8 M5×0.75 M5×0.9№10-24UNC №10-32UNFW3/16-24SM3/16-24 SM3/16-28 SM3/16-32 SM3/16-40STIM4×0.7STI№6-32UNC
M5×0.5
M5.5×0.5
M6×1№12-24UNC №12-28UNF №12-32UNEFW7/32-24SM15/64-28 SM7/32-32STIM4.5×0.75 STIM5×0.8STI№8-32UNC STI№10-24UNC STI№10-32UNF
M6×0.75
M6×0.5STI№8-36UNF
M7×1STI№12-24UNC
M7×0.75STIM6×0.75STI№12-28UNF
  • Corresponding pitches meet with the pitches of other kinds.
  • Concerning Hand of threads, both right and left are applicable in the same blank.