National Item Identification Number
00-171-4175
001714175
6650-00-171-4175
6650001714175
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)
Reference Numbers (Part Numbers)
252857PC2
Required Categories
MATERIAL
REFRACTION INDEX
POLISHED SURFACE
POLISHED PERIPHERY
DIAMETER
THIC
Required Description
GLASS, OPTICAL, JAN-G-174, TYPE 517-645, GRADE A
1.5171 NOMINAL
BOTH
NOT PROV