A quick additional note: The GO and No-Go gages were used as manufacturing limits. The field gage is a practical maximum. As the lugs are on a slight incline, "almost closed" is definitely not the same as "fully closed"!
A quick additional note: The GO and No-Go gages were used as manufacturing limits. The field gage is a practical maximum. As the lugs are on a slight incline, "almost closed" is definitely not the same as "fully closed"!