Offshore

International news and technology for marine/offshore operations around the world.

Injection Molding Design Guide

Guide for high quality and cost-effective plastic injection molding.

CNC Machining Design Guide

Optimize your designs, reduce machining time, and lower your costs.

Metal 3D Printing Design Guide

Direct Metal Laser Sintering (DMLS) 3D printing for parts with reduced cost and little waste.

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Size Basic Major Diameter Basic Pitch Diameter Minor Diameter Minor Dia. Area Tensile Stress Area
Size Primary Size Secondary External Thread Internal Thread
inch inch inch inch inch inch sq. inch sq. inch
#6 (0.138)*   0.1380 0.1177 0.1008 0.1042 0.00745 0.00909
#8 (0.164)*   0.1640 0.1437 0.1268 0.1302 0.01196 0.0140
#10 (0.190)   0.1900 0.1697 0.1528 0.1562 0.01750 0.0200
  #12 (0.216)* 0.2160 0.1957 0.1788 0.1822 0.0242 0.0270
1/4*   0.2500 0.2297 0.2128 0.2162 0.0344 0.0379
5/16*   0.3125 0.2922 0.2753 0.2787 0.0581 0.0625
3/8*   0.3750 0.3547 0.3378 0.3412 0.0878 0.0932
7/16   0.4375 0.4172 0.4003 0.4037 0.1237 0.1301
1/2   0.5000 0.4797 0.4628 0.4662 0.166 0.173
9/16   0.5625 0.5422 0.5253 0.5287 0.214 0.222
5/8   0.6250 0.6047 0.5878 0.5912 0.268 0.278
  11/16 0.6875 0.6672 0.6503 0.6537 0.329 0.339
3/4   0.7500 0.7297 0.7128 0.7162 0.395 0.407
  13/16 0.8125 0.7922 0.7753 0.7787 0.468 0.480
7/8   0.8750 0.8547 0.8378 0.8412 0.547 0.560
  15/16 0.9375 0.9172 0.9003 0.9037 0.632 0.646
1   1.0000 0.9797 0.9628 0.9662 0.723 0.738
inch inch inch inch inch inch sq. inch sq. inch
Size Primary Size Secondary Basic Major Diameter Basic Pitch Diameter External Thread Internal Thread Minor Dia. Area Tensile Stress Area
Size Minor Diameter
* Standard Sizes of the UNC, UNF or UNEF series