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Optical Instrument Window NSN 1240-00-171-7897

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 1240-00-171-7897 NSN: 1240-00-171-7897

Features and Characteristics

Diameter
Between 45.960 millimeters and 48.000 millimeters
Thickness
3.000 millimeters
Bevel Depth
1.000 millimeters
Refraction Index
1.5171
Polished Surface
Both
Dispersion
64.5 angstroms
Reflection Reducing Surface
Both
Polished Periphery
Not provided
Bevel Angle In Deg
45.000
Material
Glass, optical, jan-g-174, type 517-645, grade a
Material
Glass, optical, jan-g-174, type 517-645, grade a
Fsc Application Data
Periscope mk 23 mod 0 and mk 24 mod 0
FSC
1240 Optical Sighting And Ranging Equipment
NIIN
001717897
NSN
1240001717897

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
181146PC9
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 1240-00-171-7897
What are the manufacturers of nsn 1240001717897?
Does this nsn 1240001717897 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 1240001717897
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 1240001717897 contain any precious metals?
No precious metal content.
Does nsn 1240001717897 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 1240001717897?
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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