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Optical Instrument Window NSN 1240-00-551-1926

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 1240-00-551-1926 NSN: 1240-00-551-1926

Features and Characteristics

Diameter
2.348 inches
Thickness
0.125 inches
Surface Finish
Fine ground
Bevel Depth
0.020 inches
Refraction Index
1.5170
Polished Surface
Both
Dispersion
64.5 angstroms
Beveled/polished Edge Plating Material
Any acceptable
Polished Periphery
Provided
Bevel Angle In Deg
45.000
Material
Glass, optical, mil-g-174, grade d, type 517-645
Material
Glass, optical, mil-g-174, grade d, type 517-645
FSC
1240 Optical Sighting And Ranging Equipment
NIIN
005511926
NSN
1240005511926

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
7591265
Cage Code:
19200
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 1240-00-551-1926
What are the manufacturers of nsn 1240005511926?
Does this nsn 1240005511926 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 1240005511926
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 1240005511926 contain any precious metals?
No precious metal content.
Does nsn 1240005511926 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 1240005511926?
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
  •   Quality Inspected Parts
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