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Observation Window NSN 1240-00-555-1661

Item Description

A transparent item of a predetermined size that permits unobstructed and undistorted view of a desired area. It may include a frame, have reference markings, grid lines and may be heat strengthened and/or tinted. It is generally used where safety, security, and/or the restriction of foreign matter are required, such as the visual examination of the inside of pressurized tanks, liquid sights, controlled liquid flow, and inspection of equipment enclosed in a housing. See window (as modified); scale, cathode ray tube; scale, plotting; window, metal; window, wood; and window panel, aircraft.

NSN 1240-00-555-1661 NSN: 1240-00-555-1661

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Features and Characteristics

Ply Quantity
1
Overall Diameter
Between 1.934 inches and 1.937 inches
Overall Thickness
0.312 inches
Surface Finish
Polished
Material Transparency
Clear
Edge Type
Beveled
Criticality Code Justification
Adav
Special Features
Light deviation not to exceed 2 min of arc and surface quali type 80-50
Material
Glass plate
Style Designator
Circular
FSC
1240 Optical Sighting And Ranging Equipment
NIIN
005551661
NSN
1240005551661

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
8261623
Cage Code:
19200
Status:
A
MSDS:

Q & A

Frequently asked questions for NSN 1240-00-555-1661
What are the manufacturers of nsn 1240005551661?
Does this nsn 1240005551661 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 1240005551661
A transparent item of a predetermined size that permits unobstructed and undistorted view of a desired area. it may include a frame, have reference markings, grid lines and may be heat strengthened and/or tinted. it is generally used where safety, security, and/or the restriction of foreign matter are required, such as the visual examination of the inside of pressurized tanks, liquid sights, controlled liquid flow, and inspection of equipment enclosed in a housing. see window (as modified); scale, cathode ray tube; scale, plotting; window, metal; window, wood; and window panel, aircraft.
Does nsn 1240005551661 contain any precious metals?
Precious metal content is unknown.
Does nsn 1240005551661 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 1240005551661?
No known electrostatic discharge.

Identification Group

Item Identification Guide (IIG) and Item Name Code (INC)
INC
FIIG
App. Key
Cond. Code
Status
INC:
16880
FIIG:
A15000
App. Key:
F
Cond. Code:
2
Status:
A

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