National Item Identification Number

00-580-6531
005806531
9330-00-580-6531
9330005806531

National Stock Number

Item Name

WINDOW,OBSERVATION

Federal Supply Class

9330

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.

Commercial and Government Entity Code (Supplier Data)

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D9182

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56232

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Reference Numbers (Part Numbers)

1770911
1770911DTD2-59
93-068

Required Categories

STYLE DESIGNATOR
OVERALL DIAMETER
OVERALL THICKNESS
MATERIAL
MATERIAL DOCUME

Required Description

4 CIRCULAR
4.484 INCHES MINIMUM AND
4.516 INCHES MAXIMUM
0.234 INCHES MINIMUM