CONFIGURATION: DISC, PLANE-PARALLEL, W/ THRU-HOLES
DIAMETER: 1.500″+/-.010″
THICKNESS: 0.039″+/-.005″
THRU-HOLE DIAMETER: 0.156″+/-.005″, 4 PLACES.
THRU-HOLE LOCATION: (4) HOLES EQUALLY SPACED ON A
1.181″ DIAMETER BOLT CIRCLE.
PARALLELISM: 3 ARC MINUTES MAXIMUM.
FLATNESS: 10 WAVES/INCH MAXIMUM, 2 FACES.
SURFACE QUALITY: 80-50 PER MIL-O-13830, 2 FACES.
MATERIAL TYPE/QUALITY: SAPPHIRE, OPTICAL GRADE.
CRYSTALLOGRAPHIC ORIENTATION: RANDOM.
COATING: NONE, NOT REQUIRED.