OUTER DIAMETER: 38.10mm + 0.00mm /- 0.10mm
INNER DIAMETER: 4.00mm +/- 0.10mm
CONCENTRICITY: OD TO ID WITHIN 0.013mm MAXIMUM TIR
THICKNESS: 4.00mm +/- 0.05mm
PARALLELISM: 2 ARC SECONDS MAXIMUM.
FLATNESS: 1/5 WAVE MAXIMUM @ 633um, 2 FACES.
SURFACE FINISH: 60-40 PER MIL-PRF-13830, 2 FACES.
MATERIAL TYPE/QUALITY: SAPPHIRE, OPTICAL GRADE.
CRYSTALLOGRAPHIC ORIENTATION: (0001).