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Coarse Thread Series, UNC

Basic Sizes

 

1 2 3 4 5 6
Designation Pitch (inches) Major Diameter Effective Diameter Minor Diameter
Nut and Bolt (inches) Nut and Bolt (inches) Nut (inches) Bolt (inches)
0.05000 0.2500 0.2175 0.1959 0.1887
0.05556 0.3125 0.2764 0.2524 0.2443
0.06250 0.3750 0.3344 0.3073 0.2983
0.07143 0.4375 0.3911 0.3602 0.3499
0.07692 0.5000 0.4500 0.4167 0.4056
0.08333 0.5625 0.5084 0.4723 0.4603
0.09091 0.6250 0.5660 0.5266 0.5135
0.10000 0.7500 0.6850 0.6417 0.6273
0.11111 0.8750 0.8028 0.7547 0.7387
0.12500 1.0000 0.9188 0.8647 0.8466
0.14286 1.1250 1.0322 0.9704 0.9497
0.14286 1.2500 1.1572 1.0954 1.0747
0.16667 1.3750 1.2667 1.1946 1.1705
0.16667 1.5000 1.3917 1.3196 1.2955
0.20000 1.7500 1.6201 1.5335 1.5046
0.22222 2.0000 1.8557 1.7594 1.7274
0.22222 2.2500 2.1057 0.0094 1.9774
0.25000 2.5000 2.3376 2.2294 2.1933
0.25000 2.7500 2.5876 3.4794 2.4433
0.25000 3.0000 2.8376 2.7294 2.6933
0.25000 3.2500 3.0876 2.9794 2.9433
0.25000 3.5000 3.3376 3.2294 3.1933
0.25000 3.7500 3.5876 3.4794 3.4433
0.25000 4.0000 3.8376 3.7294 3.6933

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