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Drawing (Threads (Minor diameter of a thread, Pitch is distance between…
Drawing
Threads
Minor diameter of a thread
Pitch is distance between one crest to another
Major diameter of thread
Lead is the exact measurement
Sectioning
Half Section
cut in quarter
Rules
Lines mean section has been cut
When areas are to thin for lines colour
Multiple areas you need to change the lines (bigger gaps between)
Section lines must go through internal threads
Full Section
cut in half
True Length
Line parallel to horizontal plane in vertical is true length in horizontal plane
A point is perpendicular it is true length in the perpendicular plane
Line parallel to vertical plane in horizontal is true length in vertical plane
Symbols
Welding
Arrow
Surface finish
Tick