8211655

Optical instrument window

8211655 Description

0.170 inches diameter, 0.030 inches thickness, 0MATL: red glass, type iii, spec MIL-F-12717; element in accord with spec MIL-O-13830; surface quality 80-50; max wedge not to exceed 15 minutes (0.250 deg) ; rim .

Features

0matl: red glass, type iii, spec mil-f-12717; element in accord with specification mil-o-13830; surface quali type 80-50; max wedge not to exceed 15 minutes (0.250 deg); rim and chamfers ground; not to exceed 0.010 (face width); used on aiming circle m2a2

Properties of 8211655

Diameter:
Between 0.170 inches and 0.180 inches
Thickness:
Between 0.030 inches and 0.040 inches
Polished Surface:
Both
Polished Periphery:
Provided
Material:
Glass
Material:
Glass
NSN:
1240-01-081-5346
Description:
Window,optical Instrument
Cage Code:

Definition Optical Instrument Window

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.

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Last modified 11/17/2024