1. Unified National Threads
  2. Unified National Fine

Unified National Fine

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Total record count: 30.

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UNF (Unified Fine Thread) Angle of Thread 60 Degrees
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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 0.06 80 0.01 0.04 0.05 0.00 8 0 0.05 1.3
Number 1 0.07 72 0.01 0.06 0.06 0.00 9 0 0.06 1.6 52
Number 2 0.09 64 0.02 0.07 0.07 0.00 10 0 0.07 1.9 48
Number 3 0.10 56 0.02 0.08 0.08 0.00 11 0 0.08 2.2 44
Number 4 0.11 48 0.02 0.09 0.09 0.00 13 0 0.09 2.4 3/32
Number 5 0.13 44 0.02 0.10 0.10 0.00 140 0 0.11 2.7 36
Number 6 0.14 40 0.03 0.11 0.11 0.00 15 0 0.12 3.0 32
Number 8 0.16 36 0.03 0.13 0.13 0.00 17 0 11/32 0.14 3.6 28
Number 10 0.19 32 0.03 0.15 0.16 0.00 19 0 3/8 0.16 4.1 21
Number 12 0.22 28 0.04 0.17 0.18 0.01 22 0 0.18 4.7 13
1/4 0.25 28 0.04 0.21 0.21 0.01 22 0 7/16 0.22 5.5 7/32
5/16 0.31 24 0.04 0.26 0.27 0.01 26 0 1/2 0.27 6.9 I
3/8 0.38 24 0.04 0.32 0.03 0.01 26 0 9/16 0.33 8.5 Q
7/16 0.44 20 0.05 0.38 0.38 0.01 31 0 5/8 0.39 9.9 25/64
1/2 0.50 20 0.05 0.44 0.45 0.01 31 0 3/4 0.45 11.4 29/64

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