Rationale:
REVISE THREAD SPECIFICATION TO AS8879. ADD MAX RAD TO BOTTOM OF CBORE, ADD ANSI Y14.5M-1982. REVISE COUNTERBORE DEPTH, DIM F, FOR HOLES WITH SERRATIONS, REVISE DIM B TOLERANCE, ADD NOTE FOR FULL THREAD DEPTH IN BLIND HOLES, GENERAL EDITORIAL UPDATE INCLUDING FIGURE 1 REDRAWN UPDATED AND TABLE 1 FORMAT UPDATED.
