Definition For Feature Of Size

The former definition for a feature of size was stated as follows: "One cylindrical or spherical surface, or a set of two plane parallel surfaces, each of which is associated with a size dimension." The former definition did not specify a requirement for the two parallel surfaces to be opposed. For the present definition, see para. 1.3.17.

D3 APPLICABILITY OF RFS, MMC, AND LMC

In this issue of the Standard, the RFS symbol is no longer required to indicate "regardless of feature size" for a tolerance of position. See Fig. D-l. Both former Rules #2 and #3 have been replaced by a single new Rule #2. Former Rules #2 and #3 were stated as follows:

(a) Tolerances of Position (Rule #2). RFS, MMC, or LMC must be specified on the drawing with respect to the individual tolerance, datum reference, or both, as applicable.

(b) All Other Geometric Tolerances (Rule #3), RFS applies with respect to the individual tolerance, datum reference, or both, where no modifying symbol is specified. MMC must be specified on the drawing where it is required.

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