12 Questions
What is the term for the surface that connects a thread's root and crest?
Flank
What is the axial distance between the crest and the root of a thread?
Thread depth
What is the diameter of the imaginary co-axial cylinder that touches the crest of the external thread?
Major diameter
What is the angle formed by two adjacent flanks of two threads in the axial plane?
Thread angle
What is the distance between two identical threads?
Pitch
What is the average of the major and minor diameter?
Pitch diameter
What is the term for the outermost surface of the threads?
Crest
What is the diameter of the imaginary co-axial cylinder that touches the root of the external thread?
Minor diameter
What is the angle between the helix of the thread and a line that is normal to the axis of rotation?
Helix angle
What are the two adjustable threads that form a flat or rounded surface on the bottom?
Root and crest
What is the term for the largest diameter of a thread?
Major diameter
What is the surface that forms a thread’s root and crest?
Flank
Test your knowledge of the different parts of a thread, including the root, crest, flank, thread angle, and tread depth.
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