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ASTM WK89446
Add tolerances to piston scribe marks. In section 6.4.2 piston require scribe marks 4mm apart with the bottom mark 48mm from the reference point to the top of the die but there are no tolerances for the placement of these marks. Use of a “shall” without tolerance makes it unclear whether you are meeting the requirement.
Date Initiated: 01-27-2024
Technical Contact: Brian Bushey
Item: 002
Ballot: D20.30 (24-02)
Status: Will Reballot Item