5310-00-989-5945 NUT,PLAIN,HEXAGON Index 1240-00-989-5947 WINDOW,OPTICAL INSTRUMENT

National Stock Number:
9340-00-989-5946

Federal Supply Class:
9340

National Item Identification Number:
009895946

Description:
WINDOW,OBSERVATION

Detail:
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.


Manufacturer Information:
861992319200US ARMY ARDEC RDECOM
9340009895946SCY13E.C.A ETABLISSEMENT CENTRALD'APPROVISIONNEMENT DES FORCES ARMEE


Techincal Specification:
FIRST CORNER RADIUS0.187 INCHES NOMINAL
FOURTH CORNER RADIUS0.187 INCHES NOMINAL
OVERALL LENGTH4.850 INCHES MINIMUM AND 4.865 INCHES MAXIMUM
OVERALL THICKNESS0.240 INCHES MINIMUM AND 0.250 INCHES MAXIMUM
OVERALL WIDTH3.037 INCHES MINIMUM AND 3.052 INCHES MAXIMUM
MATERIAL TRANSPARENCYCLEAR
MATERIALGLASS
PLY QUANTITY1
SECOND CORNER RADIUS0.187 INCHES NOMINAL
SPECIAL FEATURESLIGHT DEVIATION NOT TO EXCEED 3 MIN OF ARC AND SURFACE QUALITY 80-50
STYLE DESIGNATORROUNDED CORNERS
SURFACE FINISHPOLISHED
THIRD CORNER RADIUS0.187 INCHES NOMINAL


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