... ANSI B1.11–1958 (R2001) isbased on the withdrawn ASA Truncated Whitworth standard, dimensional nomenclatureis described below.Machinery's Handbook 27th EditionCopyright 2004, Industrial ... Handbook 27th EditionCopyright 2004, Industrial Press, Inc., New York, NY1894 MEASURING SCREW THREADSeter may be determined. The cone-shaped point of the measuring screw is slightly roundedso ... applied toClass 3G or Class 4G allowances used on Class 2G internally threaded product. Also, thesepercentages could be applied to Class 4G allowances used on Class 3G internally threadedproduct....