World Pumps

Major news, innovation and real-life applications for pumps and ancillary equipment.

Autonomous Vehicle Engineering

The No. 1 media source for those developing the next generation mobility solutions.

Negotiate Your Salary

Learn the best principles to negotiate the salary you deserve!

Laser Focus World

Semiconductors, medical equipment, lasers, optics and aviation and aerospace.

more free magazines
 
Size Major Dia Threads Per Inch Pitch Dia Minor Dia Externala Minor Dia Internalb Minor Dia Area Tensile Stress Area
# inch tpi inch inch inch sq. inch sq. inch
#1* 0.073 64 0.0629 0.0544 0.0561 0.00218 0.00263
#2 0.086 56 0.0744 0.0648 0.0667 0.0031 0.0037
#3* 0.099 48 0.0855 0.0741 0.0764 0.00406 0.00487
#4 0.112 40 0.0958 0.0822 0.0849 0.00496 0.00604
#5 0.125 40 0.1088 0.0952 0.0979 0.00672 0.00796
#6 0.138 32 0.1177 0.1008 0.1042 0.00745 0.00909
#8 0.164 32 0.1437 0.1268 0.1302 0.01196 0.014
#10 0.19 24 0.1629 0.1404 0.1449 0.0145 0.0175
#12* 0.216 24 0.1889 0.1664 0.1709 0.0206 0.0242
¼ 0.25 20 0.2175 0.1905 0.1959 0.0269 0.0318
5/16 0.3125 18 0.2764 0.2464 0.2524 0.0454 0.0524
3/8 0.375 16 0.3344 0.3005 0.3073 0.0678 0.0775
7/16 0.4375 14 0.3911 0.3525 0.3602 0.0933 0.1063
½ 0.5 13 0.45 0.4084 0.4167 0.1257 0.1419
9/16 0.5625 12 0.5084 0.4633 0.4723 0.162 0.182
5/8 0.625 11 0.566 0.5168 0.5266 0.202 0.226
¾ 0.75 10 0.685 0.6309 0.6417 0.302 0.334
7/8 0.875 9 0.8028 0.7427 0.7547 0.419 0.462
1 1 8 0.9188 0.8512 0.8647 0.551 0.606
1-1/8 1.125 7 1.0322 0.9549 0.9704 0.693 0.763
1.25 7 1.1572 1.0799 1.0954 0.89 0.969
1-3/8 1.375 6 1.2667 1.1766 1.1946 1.054 1.155
1.5 6 1.3917 1.3016 1.3196 1.294 1.405
1.75 5 1.6201 1.5119 1.5335 1.74 1.9
2 2 4.5 1.8557 1.7353 1.7594 2.3 2.5
2.25 4.5 2.1057 1.9853 2.0094 3.02 3.25
2.5 4 2.3376 2.2023 2.2294 3.72 4
2.75 4 2.5876 2.4523 2.4794 4.62 4.93
3 3 4 2.8376 2.7023 2.7294 5.62 5.97
3.25 4 3.0876 2.9523 2.9794 6.72 7.1
3.5 4 3.3376 3.2023 3.2294 7.92 8.33
3.75 4 3.5876 3.4523 3.4794 9.21 9.66
4 4 4 3.8376 3.7023 3.7294 10.61 11.08
# inch tpi inch inch inch sq. inch sq. inch
Size Major Dia Threads Per Inch Pitch Dia Minor Dia Externala Minor Dia Internalb Minor Dia Area Tensile Stress Area
* Secondary Size aForm for UNR thread bBasic Minor Diameter