Optical Instrument Window

Model / MPN: 189658PC11 | NSN: 1240-00-641-0661

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

1240-00-641-0661

Sold in multiples of

1 EA

DEMIL

DEMIL/MLI

Diameter

36.000 millimeters

Thickness

4.000 millimeters

Refraction Index

1.5170

Polished Surface

Both

Reflection Reducing Surface

Both

Polished Periphery

Not provided

Material

Glass, optical, jan-g-174, type 517-645, grade c

Material

Glass, optical, jan-g-174, type 517-645, grade c

Fsc Application Data

Rangefinder mk 42, all mods

189658PC Series Parts

Pricing and Availability

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189658PC11 Cross Reference

189658PC11