What is the thread pitch for a 10-32 fastener?

• A. 24
• B. 32
• C. 0.0420"
• D. 0.0313"

Answer: (D)

Thread pitch is the distance between adjacent threads along the screw, measured parallel to the axis. For imperial threads, pitch equals 1 divided by the number of threads per inch. A 10-32 fastener has 32 threads per inch, so the pitch is 1/32 inch, which is 0.03125 inches. That rounds to 0.0313 inches. The diameter (10) doesn’t affect the pitch; it just identifies the screw size, while the 32 tells you how fine the thread is.