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Optical Instrument Window NSN 1240-00-581-2100

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 1240-00-581-2100 NSN: 1240-00-581-2100

Features and Characteristics

Diameter
20.000 millimeters
Thickness
6.000 millimeters
Surface Finish
Polished
Refraction Index
1.5170
Polished Surface
Both
Dispersion
64.5 angstroms
Polished Periphery
Not provided
Special Features
One peripheral groove 1 mm /0.0393 in./ w, 0.5 mm /0.0196 in./ deep and 6 mm /0.2362 in./ lg across thk dim
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
Telescope, straight
FSC
1240 Optical Sighting And Ranging Equipment
NIIN
005812100
NSN
1240005812100

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
279422PC14
Cage Code:
10001
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 1240-00-581-2100
What are the manufacturers of nsn 1240005812100?
Does this nsn 1240005812100 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 1240005812100
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 1240005812100 contain any precious metals?
No precious metal content.
Does nsn 1240005812100 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 1240005812100?
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
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