Machinery's Handbook, 31st Edition
2028
Metric Screw Threads M Profile Table 12. Internal Metric Thread - M Profile Limiting Dimensions, ANSI/ASME B1.13M-2005 (R2015)
Table 12. (Continued) Internal Metric Thread - M Profile Limiting Dimensions,
Minor Diameter D 1
Pitch Diameter D 2
Major Diameter D
Basic Thread Designation
Toler. Class
Max. a 20.304 22.585 22.407 24.698 24.513 25.417 27.698 27.513 30.786 30.513 30.417 33.513 35.417 36.877 36.513 39.513 40.417 42.964 42.513 45.417 49.056 48.525 50.429 55.429 57.149 56.525 60.429 65.241 64.525 65.429 70.429 73.241 72.525 75.429 81.241 80.525 80.429 85.525 91.241 90.525 95.539
Min.
Max.
Min.
Max.
Tol.
Min.
6H 6H 6H 6H 6H 6H 6H 6H 6H 6H 6H 6H 6H 6H 6H 6H 6H 6H 6H 6H 6H 6H 6H 6H 6H 6H 6H 6H 6H 6H 6H 6H 6H 6H 6H 6H 6H 6H 6H 6H 6H 6H 6H
18.917 19.294 20.376 20.752 21.835 23.376 23.752 24.835 26.211 27.835 28.376 30.835 33.376 31.670 33.835 36.835 38.376 37.129 39.835 43.376 42.587 45.835 48.376 53.376 50.046 53.835 58.376 57.505 61.835 63.376 68.376 65.505 69.835 73.376 73.505 77.835 78.376 82.835 83.505 87.835 92.835 93.505 97.835
19.153 19.744 20.676 21.252 22.210 23.676 24.252 25.210 26.771 28.210 28.676 31.210 33.676 32.270 34.210 37.210 38.676 37.799 40.210 43.676 43.297 46.210 48.676 53.676 50.796 54.210 58.676 58.305 62.210 63.676 68.676 66.305 70.210 73.676 74.305 78.210 78.676 83.210 84.305 88.210 93.210 94.305 98.210
19.350 20.376 21.026 22.051 22.701 24.026 25.051 25.701 27.727 28.701 29.026 31.701 34.026 33.402 34.701 37.701 39.026 39.077 40.701 44.026 44.752 46.701 49.026 54.026 52.428 54.701 59.026 60.103 62.701 64.026 69.026 68.103 70.701 74.026 76.103 78.701 79.026 83.701 86.103 88.701 93.701 96.103 98.701
19.510 20.600 21.216 22.316 22.925 24.226 25.316 25.925 28.007 28.925 29.226 31.925 34.226 33.702 34.925 37.925 39.226 39.392 40.925 44.226 45.087 46.937 49.238 54.238 52.783 54.937 59.238 60.478 62.937 64.238 69.238 68.478 70.937 74.238 76.478 78.937 79.238 83.937 86.478 88.937 93.951 96.503 98.951
0.160 0.224 0.190 0.265 0.224 0.200 0.265 0.224 0.280 0.224 0.200 0.224 0.200 0.300 0.224 0.224 0.200 0.315 0.224 0.200 0.335 0.236 0.212 0.212 0.355 0.236 0.212 0.375 0.236 0.212 0.212 0.375 0.236 0.212 0.375 0.236 0.212 0.236 0.375 0.236 0.250 0.400 0.250 0.250 0.250 0.250 0.250 0.250 0.250 0.300 0.300 0.300 0.335 0.335
20.000 22.000 22.000 24.000 24.000 25.000 27.000 27.000 30.000 30.000 30.000 33.000 35.000 36.000 36.000 39.000 40.000 42.000 42.000 45.000 48.000 48.000 50.000 55.000 56.000 56.000 60.000 64.000 64.000 65.000 70.000 72.000 72.000 75.000 80.000 80.000 80.000 85.000 90.000 90.000 95.000
M20 × 1 M22 × 2.5 M22 × 1.5 M24 × 3 M24 × 2 M25 × 1.5 M27 × 3 M27 × 2 M30 × 3.5 M30 × 2 M30 × 1.5 M33 × 2 M35 × 1.5 M36 × 4 M36 × 2 M39 × 2 M40 × 1.5 M42 × 4.5 M42 × 2 M45 × 1.5 M48 × 5 M48 × 2 M50 × 1.5 M55 × 1.5 M56 × 5.5 M56 × 2 M60 × 1.5 M64 × 6 M64 × 2 M65 × 1.5 M70 × 1.5 M72 × 6 M72 × 2 M75 × 1.5 M80 × 6 M80 × 2 M80 × 1.5 M85 × 2 M90 × 6 M90 × 2 M95 × 2 M100 × 6 M100 × 2 M105 × 2 M110 × 2 M120 × 2 M130 × 2 M140 × 2 M150 × 2 M160 × 3 M170 × 3 M180 × 3 M190 × 3 M200 × 3
100.000 101.266 100.000 100.539 105.000 105.539 110.000 110.539 120.000 120.539 130.000 130.539 140.000 140.539 150.000 150.539 160.000 160.733 170.000 170.733 180.000 180.733 190.000 190.768
6H 102.835 103.210 103.701 103.951 6H 107.835 108.210 108.701 108.951 6H 127.835 128.210 128.701 128.951 6H 137.835 138.210 138.701 138.951 6H 147.835 148.210 148.701 148.951 6H 156.752 157.252 158.051 158.351 6H 117.835 118.210 118.701 118.951 6H 166.752 167.252 168.051 168.351 6H 176.752 177.252 178.051 178.351 6H 186.752 187.252 188.051 188.386 6H 196.752 197.252 198.051 198.386
200.000 200.768 a This reference dimension is used in design of tools, etc., and is not normally specified. Generally, major diameter acceptance is based upon maximum material condition gaging. All dimensions are in millimeters.
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