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Optical Instrument Window NSN 1240-01-497-4320

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 1240-01-497-4320 NSN: 1240-01-497-4320

Features and Characteristics

Diameter
Between 41.9 millimeters and 42.0 millimeters
Thickness
Between 8.9 millimeters and 9.0 millimeters
End Application
Fc33 electrical and electronic adapter assembly pn 5612561; periscope
Polished Periphery
Not provided
Part Name Assigned By Controlling Agency
Eyepiece, el-1
Special Features
Convex radius is 55.4 mm max
Material
Magnesium fluoride and glass, optical
Material
Magnesium fluoride and glass optical
FSC
1240 Optical Sighting And Ranging Equipment
NIIN
014974320
NSN
1240014974320

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
5612975
Cage Code:
53711
Status:
A
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 1240-01-497-4320
What are the manufacturers of nsn 1240014974320?
Does this nsn 1240014974320 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 1240014974320
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 1240014974320 contain any precious metals?
No precious metal content.
Does nsn 1240014974320 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 1240014974320?
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:
FA
Cond. Code:
2
Status:
A

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  •   Certificate of Conformance
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