Machine Screw 5-40 x 1/4 inch p-ph

Basic diameters and threads of Standard SAE numeric system small
machine screws are shown below.

The diameters of machine screws are indicated with the number of
threads per inch count.

Here is a list of common sizes in inches:

• 2-56: 0.0860" or 43/500" in diameter; 56 threads per inch
  
• 4-40: 0.1120" or 14/125" in diameter; 40 threads per inch
  
• 5-40: 0.1250" or 1/8" in diameter; 40 threads per inch
  
• 6-32: 0.1380" or 69/500" in diameter; 32 threads per inch
  
• 8-32: 0.1640" or 41/250" in diameter; 32 threads per inch
  
• 10-32: 0.1900" or 19/100" in diameter; 32 threads per inch
  
• 10-24: 0.1900" or 19/100" in diameter; 24 threads per inch
  
• 12-24: 0.2160" or 27/125" in diameter; 24 threads per inch