National Item Identification Number
01-056-6191
010566191
6660-01-056-6191
6660010566191
National Stock Number
Item Name
WINDOW,OPTICAL INSTRUMENT
Federal Supply Class
6660
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)
7361205
Required Categories
POLISHED SURFACE
SURFACE FINISH
DIAMETER
THICKNESS
BEVEL ANGLE IN DEG
THE M
Required Description
BOTH
POLISHED
3.995 INCHES MINIMUM AND
4.000 INCHES MAXIMUM
0.730 INCHES MIN