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Observation Window NSN 9340-00-497-9761

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 9340-00-497-9761 NSN: 9340-00-497-9761

Features and Characteristics

Overall Length
3.550 inches
Overall Width
2.566 inches
Overall Thickness
0.150 inches
End Application
1090-00-923-5971
Surface Finish
Ground
Material Transparency
Clear
Edge Type
Beveled
Cubic Measure
1.367 cubic inches
Heat Absorbing Characteristic
High light transmission
Special Features
Glass is mirror selec (for silvering) ; element per mil-r-6771, type i; clear aperature = entrance 66 mm x 63.5mm; surface quality = central zone 30-10, outer zone 40-20 per mil-o-13830; light deviation not to exceed 2 min. Ofarc; angle of incidence = 45 deg., white light reflectance 40% +/- 5%, absorption not to exceed 5%; edge chips allowable outside central zone, size and number per mil-o-13830; all edges chamfered to 0.01 + x 45 deg. +/- 5 deg. ; part to be handled on edges only; 2 corners on polished sides chamfered to0.030 in. X 45 deg.; opposite 2 corners are chamfered to 0.480 in. X 44 degrees
Material
Glass plate
Material Specification
Dd-g-451, type i, class 1, qualityq1 federal specification single material response
Style Designator
Chamfered corners
FSC
9340 Glass Fabricated Materials
NIIN
004979761
NSN
9340004979761

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
7791932
Cage Code:
19204
Status:
A
MSDS:

Foreign Trade & Schedule B

What is a Schedule B number? Find more information at help.cbp.gov
  • Schedule B Number: 7016900000
  • NAICS: 327215
  • SITC: 66496
  • Description: Pressed or molded glass articles, wired or not, for building or construction;leaded glass windows etc; formed multicellular or foam glass
  • End Use (Code 13200):
    Glass-plate, sheet, etc.

Q & A

Frequently asked questions for NSN 9340-00-497-9761
What are the manufacturers of nsn 9340004979761?
Does this nsn 9340004979761 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 9340004979761
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 9340004979761 contain any precious metals?
No precious metal content.
Does nsn 9340004979761 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 9340004979761?
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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  •   Certificate of Conformance
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