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

Machine screw with 4-40 thread and 1/4 inch long with phillips pan head in 18-8 stainless steel with a black oxide finish.

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