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Technical Specifications

Plug Style

Plug Style 4-Thread Chamfer

Bottoming Style

Bottoming Style 2-Thread Chamfer

Spiral Pointed Plug

Spiral Pointed Plug 4-Thread Chamfer

Spiral Flute Bottoming

Spiral Flute Bottoming 2-Thread Chamfer
Thread
Size
Tap Dimensions Number of Flutes
Length
Overall
A
Length
of Thread
B
Length
of Square
C
Diameter
of Shank
D
Size of
Square
Finishing
Plug &
Bottoming
Spiral
Point
Plug
Spiral
Flute
Bottoming
Unified Coarse
2-56 1.88 0.56 0.19 0.14 0.11 3 2 2
3-48 1.94 0.63 0.19 0.14 0.11 3 2 2
4-40 2.00 0.69 0.19 0.14 0.11 3 2 2
5-40 2.13 0.75 0.25 0.17 0.13 3 2 3
6-32 2.38 0.88 0.25 0.19 0.15 3 2 3
8-32 2.38 0.94 0.28 0.22 0.17 3 2 3
10-24 2.50 1.00 0.31 0.26 0.19 3 2 3
12-24 2.72 1.13 0.38 0.32 0.24 3 2 3
1/4-20 2.72 1.13 0.38 0.32 0.24 3 2 3
5/16-18 2.94 1.25 0.44 0.38 0.29 4 3 3
3/8-16 3.38 1.66 0.44 0.37 0.28 4 3 3
7/16-14 3.59 1.66 0.50 0.43 0.32 4 3 4
1/2-13 3.81 1.81 0.56 0.48 0.36 4 3 4
9/16-12 4.03 1.81 0.63 0.54 0.41 4 -- --
5/8-11 4.25 2.00 0.69 0.59 0.44 4 -- --
3/4-10 4.69 2.22 0.75 0.70 0.52 4 -- --
7/8-9 5.13 2.50 0.81 0.80 0.60 4 -- --
1-8 5.75 2.56 1.00 1.02 0.77 4 -- --
1-1/8-7 6.06 3.00 1.17 1.11 0.83 4 -- --
1-1/4-7 6.38 3.00 1.13 1.23 0.93 4 -- --
1-3/8-6 6.69 3.19 1.13 1.31 0.98 4 -- --
1-1/2-6 7.00 3.19 1.25 1.43 1.07 6 -- --
Unified Fine
0-80 1.70 0.38 0.23 0.14 0.11 3 --- ---
3-56 1.94 0.63 0.19 0.14 0.11 3 2 2
4-48 2.00 0.69 0.19 0.14 0.11 3 2 2
6-40 2.13 0.75 0.25 0.17 0.13 3 2 3
8-36 2.38 0.94 0.28 0.22 0.17 3 2 3
10-32 2.50 1.00 0.31 0.26 0.19 3 2 3
1/4-28 2.72 1.13 0.38 0.32 0.24 3 2 3
5/16-24 2.94 1.25 0.44 0.38 0.29 4 3 3
3/8-24 3.16 1.44 0.81 0.32 0.29 4 3 3
7/16-20 3.38 1.66 0.44 0.37 0.28 4 3 3
1/2-20 3.59 1.66 0.50 0.43 0.32 4 3 4
9/16-18 3.81 1.81 0.56 0.48 0.36 4 -- --
5/8-18 4.03 1.81 0.63 0.54 0.41 4 -- --
3/4-16 4.47 2.00 0.69 0.65 0.49 4 -- --
7/8-14 5.13 2.50 0.81 0.80 0.60 4 -- --
1-12 5.44 2.56 0.88 0.90 0.67 4 -- --
1-1/8-12 5.75 2.56 1.00 1.02 0.77 4 -- --
1-1/4-12 6.06 3.00 1.06 1.11 0.83 6 -- --
1-3/8-12 6.38 3.00 1.13 1.23 0.93 6 -- --
1-1/2-12 6.69 3.19 1.13 1.31 0.98 6 -- --
Metric Coarse
M2X.4 46.04 12.70 4.77 3.580 2.800 3 2 2
M2.2X0.45 47.62 14.29 4.76 3.580 2.790 3 2 2
M2.5X0.45 49.21 15.88 4.76 3.580 2.790 3 2 2
M3X0.5 50.80 17.46 4.76 3.580 2.790 3 2 2
M3.5X0.6 53.98 19.05 6.35 4.270 3.330 3 2 3
M4X0.7 60.32 22.22 6.35 4.930 3.860 3 2 3
M5X0.8 63.50 25.40 7.94 6.480 4.850 3 2 3
M6X1 69.06 28.58 9.52 8.080 6.040 4 2 3
M7X1 74.61 31.75 11.11 9.680 7.260 4 3 3
M8X1.25 74.61 31.75 11.11 9.680 7.260 4 3 3
M10X1.5 85.72 42.07 11.11 9.320 6.980 4 3 3
M12X1.75 91.28 42.07 12.70 10.900 8.180 4 3 4
M14X2 102.39 46.04 15.88 13.770 10.310 4 3 --
M16X2 107.95 50.80 17.46 14.990 11.230 4 3 --
M18X2.5 119.06 56.36 19.05 17.700 13.280 4 -- --
M20X2.5 124.62 56.36 19.05 19.300 14.480 4 -- --
M22X2.5 130.18 63.50 20.64 20.320 15.240 4 -- --
M24X3 138.11 65.09 22.22 22.760 17.070 4 -- --
M27X3 146.05 65.09 25.40 25.980 19.460 4 -- --
Metric Fine
M8X1 74.61 31.75 11.11 9.680 7.260 4 3 3
M10X1 80.71 36.51 10.32 8.200 6.150 4 3 3
M10X1.25* 85.72 42.07 11.11 9.320 6.980 4 3 3
M12X1.25* 91.28 42.07 12.70 10.900 8.180 4 3 4
M12X1.5* 91.28 42.07 12.70 10.900 8.180 4 3 4
M14X1.5* 96.84 46.04 14.26 12.190 9.140 4 3 4
M16X1.5* 107.95 50.80 17.46 14.990 11.230 4 3 --
M18X1.5* 113.51 50.80 17.46 16.560 12.420 4 -- --
M20X1.5* 119.06 56.36 19.05 17.700 13.280 4 -- --
M22X1.5* 130.18 63.50 20.64 20.320 15.240 4 -- --
M18X2 113.51 50.80 17.46 16.560 12.420 4 -- --
M20X2 124.62 56.36 19.05 19.300 14.480 4 -- --
M22X2 130.18 63.50 20.64 20.320 15.240 4 -- --
M24X2 130.18 63.50 22.22 22.760 17.070 4 -- --
M27X2 138.11 65.09 25.40 25.930 19.460 4 -- --
M30X2 146.05 65.09 26.99 28.140 21.110 6 -- --
M39X2 177.80 80.96 31.75 36.320 27.230 6 -- --
M36X3 169.86 80.96 28.58 33.150 24.870 6 -- --
M39X3 177.80 80.96 31.75 36.200 27.230 6 -- --

Notes:

  1. All dimensions are for reference only.
  2. All dimensions for unified sizes are inches.
  3. All dimensions for metric sizes are in mm.

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