DIAMETER: 0.687″+.000″/-.002″
THICKNESS: 0.4975″+/-.0025″
PARALLELISM: 5 ARC MINUTES MAXIMUM.
FLATNESS: 4 WAVES MAXIMUM @ 633nm, 2 FACES.
EDGE BEVEL: LIGHT PROTECTIVE BEVEL, 2 PLACES.
SURFACE FINISH: 60-40 PER MIL-PRF-13830, 2 FACES.
MATERIAL TYPE/QUALITY: SAPPHIRE, OPTICAL GRADE.
CRYSTALLOGRAPHIC ORIENTATION: (0001) NOMINAL