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   2-56 UNC NC
Clear Hole = Drill ~ Probable Ø
  • Basic.086
  • +.001#44 (.086) ~ .087
  • +.004#43 (.089) ~ .090
  • +.009#42 (.0935) ~ .0945
Cut Tap % ~ Drill ~ Probable Ø
  • 76%#51 (.067) ~ .068
  • 70%1.75mm (.0689) ~ .0699
  • 65%#50 (.070) ~ .071
Form Tap % ~ Drill ~ Probable Ø
  • 65%#47 (.0785) ~ .0795
Socket Head Screw Size
  • Basic Head Height.083 - .086
  • Basic Head Diameter.134 - .140
General Data
  • Internal Hex Size5/64
  • Stress Area in Sq. In..0037