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Optical Instrument Window

Model / MPN: 8298401 | NSN: 1240-00-580-0635
ITAR Registered seal

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.

Product Details
NATO Stock Number
1240-00-580-0635
Sold in multiples of
1 EA
DEMIL
DEMIL/MLI
Width
1.312 inches
Thickness
Between 0.302 inches and 0.332 inches
Length
4.307 inches
Bevel Depth
0.125 inches
Polished Surface
Both
Reflection Reducing Surface
Both
Polished Periphery
Not provided
Bevel Angle In Deg
30.000
Criticality Code Justification
Feat
Material
Glass, optical, mil-g-174, grade c, type 517-645
Material
Glass, optical, mil-g-174, grade c, type 517-645
Fsc Application Data
Fire control periscope
82984 Series Parts

Pricing and Availability

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8298401 Cross Reference