SAE AS 3420B:2017-03-30

DELETE RADIUS AT TRANSITION OF WRENCH FLATS AND BASE FLANGE, UPDATE FEATURE CONTROL FRAME FOR STRAIGHTNESS, ADD EDGE DISTANCE EXCEPTION FOR HEAD MARKING, ADD SURFACE TEXTURE REQUIREMENTS FOR HEAD, WRENCH FLATS AND BOLT END, ADD NEW NOTE FOR DISPOSITION OF EXISTING INVENTORY, UPDATE FPI REFERENCE AND ADD STANDARD SENSITIVITY REQUIREMENT, FIGURE 1 RE-DRAWN AND GENERAL EDITORIAL CHANGES.