ASME B1.30 pdf download SCREW STANDARD THREADS: P R ACT1 I: E FOR CALCULATING AI D ROUNDIN[E DIMENSIONS 2.1.4 The final rounded value is obtained from the most precise value available and not from a series of successive rounding. For example, 0.5499 should be rounded to 0.550, 0.55 and 0.5 (not 0.6), since the most precise value available is less...