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Optical Instrument Window NSN 1240-01-171-8373

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 1240-01-171-8373 NSN: 1240-01-171-8373

Features and Characteristics

Width
Between 5.455 inches and 5.505 inches
Thickness
Between 0.970 inches and 1.007 inches
Length
Between 11.275 inches and 11.285 inches
Surface Finish
Polished
Refraction Index
Between 1.4570 and 1.4590
Polished Surface
Both
Dispersion
Between 67.3 angstroms and 68.3 angstroms
Polished Periphery
Not provided
Material
Glass, fused silica
Material
Glass, fused silica
FSC
1240 Optical Sighting And Ranging Equipment
NIIN
011718373
NSN
1240011718373

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
13084609
Cage Code:
81996
Status:
A
MSDS:
Part Number:
1354000
Cage Code:
54287
Status:
A
MSDS:
Part Number:
13084358
Cage Code:
04939
Status:
A
MSDS:
Part Number:
1446000
Cage Code:
54287
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 1240-01-171-8373
What are the manufacturers of nsn 1240011718373?
Does this nsn 1240011718373 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 1240011718373
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 1240011718373 contain any precious metals?
No precious metal content.
Does nsn 1240011718373 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 1240011718373?
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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  •   On Time Delivery
  •   Certificate of Conformance
  •   Quality Inspected Parts
  •   Quality Fast Service
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