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   1/2-13 UNC NC
Clear Hole = Drill ~ Probable Ø
  • Basic.500
  • +.0031/2 (.500) ~ .503
  • +.01933/64 (.5156) ~ .519
  • +.03417/32 (.5312) ~ .535
Cut Tap % ~ Drill ~ Probable Ø
  • 75%27/64 (.4219) ~ .425
  • 66%10.90 (.4291) ~ .432
  • 60%7/16 (.4375) ~ .4405
Form Tap % ~ Drill ~ Probable Ø
  • 64%11.80mm (.4646) ~ .4676
Socket Head Screw Size
  • Basic Head Height.492 - .500
  • Basic Head Diameter.735 - .750
General Data
  • Internal Hex Size3/8
  • Stress Area in Sq. In..1419