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12 UN Bolt Calculator

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Size
Class of Fit (Bolt - Nut)   - 
Tensile Strength of Bolt Material p.s.i.
Tensile Strength of Nut Material p.s.i.
Desired Tensile Stress in Bolt p.s.i.
Nut Factor  
Length of Engagement inches
Static Load pounds
If you can't decide, just click on "Calculate Now" and the calculator will fill in some appropriate defaults.
Click on "Help" for descriptions of what everything means.

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