UPDATE THREAD SPECIFICATION TO AS8879, UPDATE TO ANSI Y14.5M-1982, ADD POSITION REQUIREMENTS FOR DRILLED HOLES, REVISE FPI REQUIREMENTS TO ASTM E1417/1417M, REVISE HEX DIMENSIONS, ADD EDGE DISTANCE EXCEPTION FOR HEAD MARKING, FIGURE 1 REDRAWN, UPDATE REFERENCES, ADD INVENTORY NOTE, AND GENERAL EDITORIAL UPDATE.