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Model Engineer (M.E.)

Thread Form

ME Thread Form
  • p = Pitch = 1/TPI
  • h = Basic Depth of Thread = 0.640327p
  • r = Basic Radius = 0.137329p

Thread Tables

Nominal Diameter T.P.I. Basic Depth of Thread Basic Major Diameter Basic Effective Diameter Basic Minor Diameter Tapping Drill Clearing Drill
(inch) (n/a) (inch) (inch) (inch) (inch) (mm) (mm)
1/8 40 0.0160 0.1250 0.1090 0.0930 2.55 3.3
5/32 40 0.0160 0.1563 0.1402 0.1242 3.3 4.1
3/16 40 0.0160 0.1875 0.1715 0.1555 4.1 4.9
7/32 40 0.0160 0.2188 0.2027 0.1867 4.9 5.7
1/4 40 0.0160 0.2500 0.2340 0.2180 5.75 6.5
9/32 32 0.0200 0.2813 0.2612 0.2412 6.3 7.3
5/16 32 0.0200 0.3125 0.2925 0.2725 7.1 8.1
3/8 32 0.0200 0.3750 0.3550 0.3350 8.7 9.7
7/16 32 0.0200 0.4375 0.4175 0.3975 10.2 11.4
1/2 32 0.0200 0.5000 0.4800 0.4600 11.8 13.1
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Last modified: SolFlu  Sat, 13 Feb 2010 00:57:43 GMT