420 



Table 495 

 TABULAR COMPARISON OF WIRE GAGES 



"The Steel Wire Gage is the same gage which has been known by the various names: "Washburn and Moen," "Roeb- 

 ling," "American Steel and Wire Co.'s." Its abbreviation should be written "Stl. W. G.," to distinguish it from 

 "S. W. G.," the usual abbreviation for the (British) Standard Wire Gage. 



t The American Wire Gage sizes have been rounded off to the usual limits of commercial accuracy. They are given 

 to four significant figures in Tables 499 to 502. They can be calculated with any desired accuracy, being based upon 

 a simple mathematical law. The diameter ol No. 0000 is defined as 0.4600 inch and of No. 36 as 0.0050 inch. The 



ratio of any diameter to the diameter of the next greater number 



Taken from Circular No. 31. 

 tables. 



Smithsonian Tables. 



39|. 4 6oq_ 

 \ .0050 



1.1229322. 



Copper Wire Tables, U.S. Bureau of Standards which contains more complete 



