scope:

This part of ISO 14405 establishes the default specification operator (see ISO 17450‑2) for linear size and defines a number of special specification operators for linear size for features of size, e.g. "cylinder", "sphere", "torus,"1), "circle", "two parallel opposite planes", or "two parallel opposite straight lines".

It also defines the specification modifiers and the drawing indications for these linear sizes.

This part of ISO 14405 covers the following linear sizes:

a) local size:

- two-point size;

- spherical size;

- section size;

- portion size;

b) global size:

- direct global linear size:

- least-squares size;

- maximum inscribed size;

- minimum circumscribed size;

- minimax size;

- indirect global linear size;

c) calculated size:

- circumference diameter;

- area diameter;

- volume diameter