Rationale: 5 year review. Correct box sixe for datum callouts. Move datum W to under dimension callout. Update drilled hole & CSK callout to symbol and format per Y14.5M. Change 4 X 45 to 4X 45. Delete feature size symbol in straightness FCF. Change "SEE NOTE 1" to /1/. Note 4 add MIN to Level 2. Update Table 1 format to current SAE style. Update lead chamfer to AS1132J. Add new note for disposition of existing inventory.