DIAMETER: 30.00mm + 0.00mm /- 0.10mm
THICKNESS: 6.00mm +/- 0.10mm
PARALLELISM: 1 ARC MINIMUM MAXIMUM
FLATNESS: 1/4 WAVE MAXIMUM, 1 FACE
SURFACE FINISH: 60-40 PER MIL-O-13830, 2 FACES.
MATERIAL TYPE/QUALITY: SCHOTT BK-7 GLASS, GRADE A
FINE ANNEALED.
MARKING: ARROW ON OD SURFACE POINTING TOWARDS
1/4 WAVE FLAT FACES.
COATING: NONE, NOT REQUIRED.