National Item Identification Number

00-450-1746
004501746
6650-00-450-1746
6650004501746

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)

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Reference Numbers (Part Numbers)

1575481

Required Categories

MATERIAL
REFRACTION INDEX
DISPERSION
POLISHED SURFACE
SURFACE FINISH
REFLEC

Required Description

GLASS, OPTICAL, MIL-G-174, GRADE A, TYPE 517-642
1.5170 NOMINAL
64.2 ANGSTROMS