REVISE THREAD SPECIFICATION TO AS8879, ADD EDGE DISTANCE EXCEPTION FOR HEAD MARKING, UPDATE MAGNETIC PARTICLE INSPECTION REFERENCE, ADD DATUM W, DATUM U, AND POSITIONAL REQUIREMENTS FOR DRILLED HOLE, CHANGE DRILLED HOLE LOCATION (FROM BEARING FACE) TO A BASIC DIMENSION, ADD NEW EXISTING INVENTORY USE NOTE, UPDATE ANSI Y14.5M-1983 SYMBOLS, UPDATE CADMIUM NOTICE, AND GENERAL EDITORIAL REVISION.