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Optical Instrument Window NSN 1240-00-171-4220

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 1240-00-171-4220 NSN: 1240-00-171-4220

Features and Characteristics

Diameter
Between 2.5886 inches and 2.5984 inches
Thickness
0.3937 inches
Length
Between 3.4941 inches and 3.5039 inches
Refraction Index
1.5170
Polished Surface
Both
Dispersion
64.5 angstroms
Reflection Reducing Surface
Both
Polished Periphery
Not provided
Special Features
4 corners 12.7 mm /0.500 in./ radius
Material
Glass, mil-g-16592, grade b
Material
Glass, mil-g-16592, grade b
Fsc Application Data
Periscope mk 23, mod 0
FSC
1240 Optical Sighting And Ranging Equipment
NIIN
001714220
NSN
1240001714220

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
181146PC1
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 1240-00-171-4220
What are the manufacturers of nsn 1240001714220?
Does this nsn 1240001714220 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 1240001714220
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 1240001714220 contain any precious metals?
No precious metal content.
Does nsn 1240001714220 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 1240001714220?
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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