Optical Instrument Window NSN 1240-00-599-9218

Item 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.

NSN: 1240-00-599-9218

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Features and Characteristics

Width

Between 24.9 millimeters and 25.4 millimeters

Thickness

Between 4.800 millimeters and 5.200 millimeters

Length

Between 62.740 millimeters and 63.240 millimeters

Surface Finish

Polished

Bevel Depth

0.510 millimeters

Refraction Index

Between 1.5160 and 1.5180

Polished Surface

Both

Dispersion

Between 64.000 angstroms and 65.000 angstroms

Reflection Reducing Surface

Both

Polished Periphery

Not provided

Bevel Angle In Deg

45.000

Special Features

Corners rounded 0.237in. Max 0.197in. Min. Radius; resolving power to be 30 sec of arc or better as used whenscanning clear aperture with a telescope of at least a 0.5in. Aperture; light deviation not to exceed plus or minus 2 min of arc; spherical power not toexceed 7 millidiopters; astigmatism not to exceed 3 millidiopters; surface quali type 80-50

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

Sight periscope t42

FSC

1240 Optical Sighting And Ranging Equipment

NIIN

005999218

NSN

1240005999218

Manufacturer Part Numbers

Part numbers registered to this national stock number.

Part Number

Cage

Status

MSDS

Part Number:

8567556

Cage Code:

19200

Status:

MSDS:

Foreign Trade & Schedule B

What is a Schedule B number? Find more information at help.cbp.gov

Schedule B Number: 9803200000
NAICS: 990000
SITC: 93100
Description: Military equipments not identified by kind
End Use (Code 50060):
Military apparel and footwear

Q & A

Frequently asked questions for NSN 1240-00-599-9218

What are the manufacturers of nsn 1240005999218?

Us Army Ardec Rdecom (19200)

Does this nsn 1240005999218 have a shelf life?
No. This NSN does not have an applicable shelf life.

What is the formal definition of nsn 1240005999218
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.

Does nsn 1240005999218 contain any precious metals?
Precious metal content is unknown.

Does nsn 1240005999218 contain any hazardous materials?
No MSDS. No hazardous material.

What is the ESD classification of nsn 1240005999218?
No known electrostatic discharge.

Identification Group

Item Identification Guide (IIG) and Item Name Code (INC)

INC

FIIG

App. Key

Cond. Code

Status

INC:

10908

FIIG:

T271-F

App. Key:

Cond. Code:

Status:

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On Time Delivery
Certificate of Conformance
Quality Inspected Parts
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