National Item Identification Number
00-912-4227
009124227
6650-00-912-4227
6650009124227
National Stock Number
Item Name
WINDOW,OPTICAL INSTRUMENT
Federal Supply Class
6650
Description
A color free item of transparent or translucent material, usually optical glass, having specific light dispersive and refractive properties. This item must have two plane-parallel surfaces and is designed for use in an optical instrument to provide a barrier to foreign matter and/or permit light transmission in or to the optical system.
Commercial and Government Entity Code (Supplier Data)
19200
Reference Numbers (Part Numbers)
10541588
Required Categories
MATERIAL
REFRACTION INDEX
DISPERSION
POLISHED SURFACE
REFLECTION REDUCING SU
Required Description
GLASS, OPTICAL, MIL-G-174, GRADE C, TYPE 517-645
1.5170 NOMINAL
64.5 ANGSTROMS