DIAMETER: 1.220″+.000″/-.004″
THICKNESS: 0.130″+/-.002″
PARALLELISM: 3 ARC MINUTES MAXIMUM.
EDGE BEVEL: LIGHT PROTECTIVE BEVEL, 2 PLACES
FLATNESS: 10 WAVE/INCH MAXIMUM, 2 FACES
SURFACE QUALITY: 10-5 PER MIL-PRF-13830, 2 FACES.
SURFACE ROUGHNESS: 3 ANGSTROMS Ra MAXIMUM, 2 FACES
MATERIAL TYPE/QUALITY: SAPPHIRE, OPTICAL GRADE.
CRYSTALLOGRAPHIC ORIENTATION: (0001) +/- 2deg.
COATING: NONE, NOT REQUIRED.