NSN 9340-00-497-9761
Part Details | OBSERVATION WINDOW
9340-00-497-9761 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.
Alternate Parts: 7791932, 9340-00-497-9761, 00-497-9761, 9340004979761, 004979761
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 93 | OCT 03, 1969 | 00-497-9761 | 16880 ( WINDOW, OBSERVATION ) |
REFERENCE DRAWINGS & PICTURES
CHAMFERED CORNERS
Cross Reference | NSN 9340-00-497-9761
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 7791932 | 19204 | ARMY, UNITED STATES DEPARTMENT OFTHE |
Technical Data | NSN 9340-00-497-9761
| Characteristic | Specifications |
|---|---|
| STYLE DESIGNATOR | CHAMFERED CORNERS |
| OVERALL LENGTH | 3.550 INCHES NOMINAL |
| OVERALL WIDTH | 2.566 INCHES NOMINAL |
| OVERALL THICKNESS | 0.150 INCHES NOMINAL |
| MATERIAL | GLASS PLATE |
| MATERIAL DOCUMENT AND CLASSIFICATION | DD-G-451,TYPE I,CLASS 1,QUALITYQ1 FED SPEC SINGLE MATERIAL RESPONSE |
| SURFACE FINISH | GROUND |
| MATERIAL TRANSPARENCY | CLEAR |
| EDGE TYPE | BEVELED |
| HEAT ABSORBING CHARACTERISTIC | HIGH LIGHT TRANSMISSION |
| SPECIAL FEATURES | GLASS IS MIRROR SELECT(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 |
| CUBIC MEASURE | 1.367 CUBIC INCHES |
| END ITEM IDENTIFICATION | 1090-00-923-5971 |
