MAJOR DIAMETER: 2.369″+/-.004″
MINOR DIAMETER: 1.982″+/-.004″
OVERALL THICKNESS: 0.300″+/-.002″
MINOR DIAMETER HEIGHT: 0.150″+/-.002″
PARALLELISM: 0.001″/INCH MAXIMUM T.I.R.
CONCENTRICITY: DIAMETERS WITHIN 0.002″.
EDGE RADII: 0.050″+/-.010″INSIDE AND OUTSIDE RADII
SURFACE ACCURACY: 6 FRINGES MAXIMUM WITH CLEAR
APERTURE, 2 FACES.
SURFACE QUALITY: 60-40 PER MIL-PRF-13830, 2 FACES.
LAND DIAMETER FACE: 1.732″+/-.004″ (TOP FACE)
MAJOR DIA. BEVELS: 0.020″+/-.005″ X 45deg, 2 PLCS.
MATERIAL TYPE/QUALITY: SAPPHIRE, OPTICAL GRADE.
CRYSTALLOGRAPHIC ORIENTATION: (0001).
COATING: NONE, NOT REQUIRED.