DIAMETER: 1.000″+.000″/-.005″
THICKNESS: 3.00mm +/- 0.10mm
PARALLELISM: 1 ARC MINUTE MAXIMUM.
FLATNESS: 1/4 WAVE MAXIMUM, 2 FACES.
EDGE BEVEL: 0.010″ NOMINAL X 45deg, 2 PLACES.
SURFACE FINISH: 60-40 PER MIL-PRF-13830. 2 FACES.
CLEAR APERTURE: CENTRAL 90% OF DIAMETER FACES.
MATERIAL TYPE/QUALITY: FUSED SILICA, SUPRASIL 300,
LOW WATER CONTENT.
COATING: NONE, NOT REQUIRED.