The thread the provisions marked

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The various threads of painting is the same, in order to facilitate the distinction must also be marked graphics.
(1) The common thread marked marked:
The features of the code The nominal diameter × pitch rotation - in diameter, top diameter tolerance code - Scr ewing Length Code
Among them: Feature Code M
Singlet coarse thread marked only the nominal diameter, in-line fine thread standard nominal diameter × pitch.
Rotation: not marked divided into right-handed, left-handed, right-handed, left-handed with LH.hydraulic components
Pitch diameter, top diameter tolerance zone code: by the figures and said the tolerance level of tolerance position letters: 6H, 6g (internal thread with a capital letter, external thread lowercase letters). Diameter and top diameter tolerance zone code is the same, only the Note a code, such as: 7h were marked; thread diameter tolerance zone and the top diameter tolerance with different code, such as: 5g6g.
Screwing Length: The length of the screwed provisions for short (S), medium (N), length (L) three, screwed length is not marked special needs can specify the length of the screwed value, such as the M10-6g - 40.
The common thread in the chart annotation method that marking note written on the extension line of dimension lines or size, size boundaries be drawn from the large diameter of the thread.

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