National Item Identification Number

00-815-2659
008152659
4920-00-815-2659
4920008152659

National Stock Number

Item Name

WINDOW,OPTICAL INSTRUMENT

Federal Supply Class

4920

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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24446

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89954

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Reference Numbers (Part Numbers)

568A271P1
568A271P1

Required Categories

MATERIAL
REFRACTION INDEX
DISPERSION
POLISHED SURFACE
POLISHED PERIPHERY
WI

Required Description

GLASS
1.5180 NOMINAL
64.5 ANGSTROMS NOMINAL
BOTH
NOT PROVIDED
49.276 MILLIM