USE/CARE OF HANDTOOLS & MEASURING TOOLS - OD1621 - LESSON 3/TASK 1
FIGURE 152. CONVERSION CHART - DECIMALS
OF AN INCH TO MILLIMETERS.
2 The fine thread series in sizes 0 to 12 and 1/4 to 1 1/2
inches.
3 The extra fine thread series in sizes 0 to 12 and 1/2 to 2
inches.
4 The 8 pitch series in sizes from 1 to 6 inches.
5 The 12 pitch series from 1/2 to 6 inches.
6 The 16 pitch series from 3/4 to 4 inches.
(c) Classes of Fit.
The American National screw thread system
calls for four regular classes of fit.
201
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