DIAMETER: 1.000″+.000″/-.005″
THICKNESS: 0.200″+/-.001″
PARALLELISM: 3 ARC MINUTES MAXIMUM.
FLATNESS: 1/2 WAVE MAXIMUM AT 0.632um, 2 FACES.
EDGE BEVEL: 0.020″ MAXIMUM X 45deg, 2 PLACES.
SURFACE FINISH: 40-20 PER MIL-O-13830, 2 FACES.
CLEAR APERTURE: CENTRAL 80% MINIMUM, 2 FACES.
MATERIAL TYPE/QUALITY: BK-7 GLASS, GRADE A, FINE
ANNEALED.
COATING: NONE, NOT REQUIRED.