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  2. Unified National Fine

Unified National Fine

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UNF (Unified Fine Thread) Angle of Thread 60 Degrees

 

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Actions Size Outside Dia Inch Tpi Pitch Inch Core Dia Male Inch Core Dia Female Inch Radius Inch Thread Depth Male Thou Thread Depth Female Thou Hex A/flats Inch Tapping Drill Size Inch Tapping Drill Size mm Letter Or Number
Number 0 0.060 80 0.013 0.045 0.047 0.002 8 0 0.049 1.3
Number 1 0.073 72 0.014 0.056 0.058 0.002 9 0 0.063 1.6 52
Number 2 0.086 64 0.016 0.067 0.069 0.002 10 0 0.075 1.9 48
Number 3 0.099 56 0.018 0.077 0.080 0.003 11 0 0.085 2.2 44
Number 4 0.112 48 0.021 0.086 0.089 0.003 13 0 0.095 2.4 3/32
Number 5 0.125 44 0.023 0.097 0.100 0.003 140 0 0.106 2.7 36
Number 6 0.138 40 0.025 0.108 0.111 0.004 15 0 0.116 3.0 32
Number 8 0.164 36 0.028 0.130 0.134 0.004 17 0 11/32 0.140 3.6 28
Number 10 0.190 32 0.031 0.152 0.156 0.005 19 0 3/8 0.159 4.1 21
Number 12 0.216 28 0.036 0.172 0.177 0.005 22 0 0.183 4.7 13
1/4 0.250 28 0.036 0.206 0.211 0.005 22 0 7/16 0.217 5.5 7/32
5/16 0.313 24 0.042 0.261 0.267 0.006 26 0 1/2 0.272 6.9 I
3/8 0.375 24 0.042 0.324 0.033 0.006 26 0 9/16 0.335 8.5 Q
7/16 0.438 20 0.050 0.376 0.383 0.007 31 0 5/8 0.390 9.9 25/64
1/2 0.500 20 0.050 0.439 0.446 0.007 31 0 3/4 0.449 11.4 29/64
9/16 0.563 18 0.056 0.494 0.502 0.008 34 0 7/8 0.508 12.9 33/64
5/8 0.625 18 0.056 0.557 0.565 0.008 34 0 15/16 0.571 14.5 37/64
3/4 0.750 16 0.063 0.673 0.682 0.009 38 0 1 - 1/8 0.687 17.5 11/16
7/8 0.875 14 0.071 0.787 0.798 0.010 44 0 1 - 5/16 0.807 20.5 13/16
1 1.000 12 0.083 0.898 0.910 0.012 51 0 1 - 1/2 0.915 23.3 59/64
1 - 1/8 1.125 12 0.083 1.023 1.035 0.012 51 0 1 - 11/16 1.043 26.5
1 - 1/4 1.250 12 0.083 1.148 1.160 0.012 51 0 1 - 7/8 1.161 29.5
1 - 3/8 1.375 12 0.083 1.278 1.285 0.012 51 0 2 - 1/16 1.290 32.8
1 - 1/2 1.500 12 0.083 1.398 1.410 0.012 51 0 2 - 1/4 1.417 36.0
1 - 3/4 1.750 12 0.083 1.853 1.660 0.012 51 0 1.673 42.5
2 2.000 12 0.083 1.897 1.910 0.012 51 0 1.921 48.8
2 - 1/4 2.250 12 0.083 2.147 2.160 0.012 51 0 2.173 55.2
2 - 1/2 2.500 12 0.083 2.397 2.410 0.012 51 0 2.421 61.5
2 - 3/4 2.750 12 0.083 2.647 2.660 0.012 51 0 2.673 67.9
3 3.000 12 0.083 2.897 2.910 0.012 51 0 2.921 74.2

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