Table 3. American National Standard Metric Thread—M Profile Data ANSI/ASME B1.13M-2005 (R2015)
Dedendum of Internal Thread and Addendum External Thread H 8 3 0.3247595 P
Height of Internal Thread and Depth of Thread Engagement H 8 5 0.5412659 P
Truncation of Internal Thread Root
Addendum of Internal Thread and Truncation of Internal Thread H 4 0.2165064 P
Twice the External Thread Addendum H 4 3 0.649519 1P
Double Height of Internal Thread H 4 5 1.0825318 P
and External Thread Crest H 8 0.1082532 P
Difference c H 12 11 0.7938566 P
Difference a H 2 0.4330127 P
Height of Sharp V-Thread H 0.8660254 P
Difference b 0.711325 H 0.6160254 P
Pitch P
0.2 0.25 0.3 0.35 0.4 0.45 0.5 0.6 0.7 0.75 0.8 1.25 1.5 1.75 1
0.02165 0.02706 0.03248 0.03789 0.04330 0.04871 0.05413 0.06495 0.07578 0.08119 0.08660 0.10825 0.13532 0.16238 0.18944 0.21651 0.27063 0.32476 0.37889 0.43301 0.48714 0.54127 0.59539 0.64952
0.04330 0.05413 0.06495 0.07578 0.08660 0.09743 0.10825 0.12990 0.15155 0.16238 0.17321 0.21651 0.27063 0.32476 0.37889 0.43301 0.54127 0.64652 0.75777 0.86603 0.97428 1.08253 1.19079 1.29904
0.06495 0.08119 0.09743 0.11367 0.12990 0.14614 0.16238 0.19486 0.22733 0.24357 0.25981 0.32476 0.40595 0.48714 0.56833 0.64952 0.81190 0.97428 1.13666 1.29904 1.46142 1.62380 1.78618 1.94856
0.08660 0.10825 0.12990 0.15155 0.17321 0.19486 0.21651 0.25981 0.30311 0.32476 0.34641 0.43301 0.54127 0.64952 0.75777 0.86603 1.08253 1.29904 1.51554 1.73205 1.94856 2.16506 2.38157 2.59808
0.10825 0.13532 0.16238 0.18944 0.21651 0.24357 0.27063 0.32476 0.37889 0.40595 0.43301 0.54127 0.67658 0.81190 0.94722 1.08253 1.35316 1.62380 1.89443 2.16506 2.43570 2.70633 2.97696 3.24760
0.12321 0.15401 0.18481 0.21561 0.24541 0.27721 0.30801 0.36962 0.43122 0.46202 0.49282 0.61603 0.77003 0.92404 1.07804 1.23205 1.54006 1.84808 2.15609 2.46410 2.77211 3.08013 3.38814 3.69615
0.12990 0.16238 0.19486 0.22733 0.25981 0.29228 0.32476 0.38971 0.45466 0.48714 0.51962 0.64952 0.81190 0.97428 1.13666 1.29904 1.62380 1.94856 2.27332 2.59808 2.92284 3.24760 3.57236 3.89711
0.15877 0.19846 0.23816 0.27785 0.31754 0.35724 0.39693 0.47631 0.55570 0.59539 0.63509 0.79386 0.99232 1.19078 1.38925 1.58771 1.98464 2.38157 2.77850 3.17543 3.57235 3.96928 4.36621 4.76314
0.17321 0.21651 0.25981 0.30311 0.34641 0.38971 0.43301 0.51962 0.60622 0.64952 0.69282 0.86603 1.08253 1.29904 1.51554 1.73205 2.16506 2.59808 3.03109 3.46410 3.89711 4.33013 4.76314 5.19615
0.21651 0.27063 0.32476 0.37889 0.43301 0.48714 0.54127 0.64952 0.75777 0.81190 0.86603 1.08253 1.35316 1.62380 1.89443 2.16506 2.70633 3.24760 3.78886 4.33013 4.87139 5.41266 5.95392 6.49519
2
2.5
3
3.5
4
4.5
5
5.5
6 8
0.86603 8.66025 a Difference between max theoretical pitch diameter and max minor diameter of external thread and between min theoretical pitch diameter and min minor diameter of internal thread. b Difference between min theoretical pitch diameter and min design minor diameter of external thread for 0.125 P root radius. c Difference between max major diameter and max theoretical pitch diameter of internal thread. All dimensions are in millimeters. 1.73205 2.59808 3.46410 4.33013 4.92820 5.19615 6.35085 6.92820
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