DIAMETER: 0.688″+/-.001″
THICKNESS: 0.433″+/-.001″
PARALLELISM: 0.002″ MAXIMUM TIR.
EDGE BEVEL: PROTECTIVE EDGE BEVEL, 2 PLACES.
FLATNESS: 0.0006″ MAXIMUM TIR, 2 FACES.
SURFACE QUALITY: 80-50 PER MIL-PRF-13830, 2 FACES.
MATERIAL TYPE/QUALITY: SAPPHIRE, OPTICAL GRADE.
CRYSTALLOGRAPHIC ORIENTATION: (0001)
COATING: NONE, UNCOATED SUBSTRATE.