Correct option is B
The depth of a thread is the perpendicular distance between the crest (highest point) and the root (lowest point) of a thread, measured normal to the thread axis. It defines how deep the thread is cut into the material, influencing the strength and load-bearing capacity of the threaded connection.
In thread specifications, the depth of thread, h is related to the pitch (P) and thread angle (θ) for standard thread profiles such as:
· Metric threads: h = 0.6134P (for 60° threads)
· Acme threads: h = 0.5P (for 29° threads)
Key Points:
· Thread depth affects load distribution and engagement strength.
· It is measured perpendicular to the axis, not along the thread surface.
· Greater thread depth provides better strength but requires more material removal.
