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Screw Threads
Geometrical and Mechanical Drawing · Chapter 6 · (c) Screw threads and spur gears
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Topics 4
- Thread terms: major, minor and pitch diameters, pitch, lead, crest, root, flank, thread angle; right- and left-hand; single- and multi-start
- Thread profiles and their proportions: ISO metric (V), BSW, square, Acme, buttress and knuckle threads, with uses
- Projection of a thread as a helix and the conventional (simplified) representation of external and internal threads
- Thread designation on drawings (for example M20 x 2.5)