In order to detect
that the size is being controlled, two-point
measurements must be made. The hole illustrated would
pass a no-go pin but would fail a two-point check. In
other words, this hole fails a proper inspection of
size.
This problem can
be avoided by remembering the two-line phrase for
measuring size:
Full
form checks at MMC Two point checks at
LMC |
This part, for
instance, is not acceptable if size is checked in
accordance with the Y14.5 Standard |