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Optical Instrument Window NSN 1240-00-171-4177

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 1240-00-171-4177 NSN: 1240-00-171-4177

Features and Characteristics

Width
Between 287.000 millimeters and 288.000 millimeters
Thickness
Between 18.800 millimeters and 19.200 millimeters
Length
Between 349.000 millimeters and 350.000 millimeters
Bevel Depth
2.000 millimeters
Refraction Index
1.5170
Dispersion
64.5 angstroms
Reflection Reducing Surface
One
Polished Periphery
Not provided
Bevel Angle In Deg
45.000
Special Features
Four rounded corners 26.5 mm plus 1.0, minus 0.0 (1.0433 in.) radius
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 mk 102 mod 3
FSC
1240 Optical Sighting And Ranging Equipment
NIIN
001714177
NSN
1240001714177

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
1235962
Cage Code:
10001
Status:
A
MSDS:
Part Number:
30091
Cage Code:
21587
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 1240-00-171-4177
What are the manufacturers of nsn 1240001714177?
Does this nsn 1240001714177 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 1240001714177
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 1240001714177 contain any precious metals?
No precious metal content.
Does nsn 1240001714177 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 1240001714177?
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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