CONFIGURATION: DISC, PLANE-PARALLEL
DIAMETER: 1.500″+/-.005″
THICKNESS: 1.125″+/-.001″
PARALLELISM: 3 ARC MINUTES MAXIMUM
EDGE BEVEL: 0.020″+/-.005″ X 45deg, 2 PLACES.
SURFACE ACCURACY: NOT SPECIFIED.
SURFACE FINISH: OD AND BEVELS GROUND AND SEMI-
POLISHED FOR LOW DAMAGE / HIGH
STRENGTH.
FACES POLISHED 60-40 PER
MIL-PRF-13830.
MATERIAL TYPE/QUALITY: SAPPHIRE, OPTICAL GRADE.
CRYSTALLOGRAPHIC ORIENTATION: (0001).
COATING: NONE, NOT REQUIRED