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UNC 0.5000-13 (1/2") 2A-2B
Thread Series, Bolt Diameter, Threads per Inch, Size, Bolt Fit, Nut Fit
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Tensile Strength of Bolt Material:

 60,000

  p.s.i.

Tensile Strength of Nut Material:

 60,000

  p.s.i.

Desired Tensile Stress in Bolt:

 30,000

  p.s.i.
     
Length of Engagement:  1
 13.00		  inch
 × pitch

Nut Factor:

 0.2

  

Static Load:

 0

  pounds
Tensile Stress in Bolt Usual Severe Root

Tensile Stress Area:

 0.142 0.137 0.126 sq.in.
Tensile Stress due to Preload: 30,000 30,000 30,000 p.s.i.

Tensile Stress due to Static Load:

 0 0 0 p.s.i.

Tensile Stress Sum:

 30,000 30,000 30,000 p.s.i.
 

Preload:

 4,257 4,104 3,771 pounds
Torque Required to Induce Preload: 35.475
 425.699		  34.202
 410.426		  31.428
 377.131		  ft-lbs
 in-lbs
 
Engagement to Protect Bolt Thread: 0.386
5.02		 0.373
 4.84		 0.342
 4.45		 inches
 ×pitch
Engagement to Protect Nut Thread: 0.257
3.34		 0.247
 3.22		  0.227
 2.96		  inches
 ×pitch
 
Bolt Thread Shear Stress
Bolt Thread Shear Stress Area: 0.735 0.735 0.735 sq.in.
Stress due to Preload: 5,796 5,588 5,134 p.s.i.
Stress due to Static Load: 0 0 0 p.s.i.
Bolt Thread Shear Stress Sum: 5,796 5,588 5,134 p.s.i.
 
Nut Thread Shear Stress
Nut Thread Shear Stress Area: 1.106 1.106 1.106 sq.in.
Stress due to Preload: 3,850 3,711 3,410 p.s.i.
Stress due to Static Load: 0 0 0 p.s.i.
Nut Thread Shear Stress Sum: 3,850 3,711 3,410 p.s.i.
 
Allowance: 0.0015 inches           Pitch: 0.0769 inches
 
           Bolt             |           Nut
 Minimum  Maximum Tolerance | Minimum  Maximum Tolerance

Major Diameter:

 0.4877 - 0.4985  (0.0109) |  0.5000 - 0.5192* (      ) inches

Pitch Diameter:

 0.4423 - 0.4485  (0.0062) |  0.4500 - 0.4581  (0.0081) inches

Minor Diameter:

 0.3924*- 0.4152  (      ) |  0.4167 - 0.4378  (0.0211) inches
* No official specification exists.