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National Stock Number:
6650-01-250-8211
Federal Supply Class:
6650
National Item Identification Number:
012508211
Description:
WINDOW,OPTICAL INSTRUMENT
Detail:
A COLOR FREE ITEM OF TRANSPARENT OR TRANSLUCENT MATERIAL, USUALLY OPTICAL GLASS, HAVING SPECIFIC LIGHT DISPERSIVE AND REFRACTIVE PROPERTIES. THIS ITEM MUST HAVE TWO PLANE-PARALLEL SURFACES AND IS DESIGNED FOR USE IN AN OPTICAL INSTRUMENT TO PROVIDE A BARRIER TO FOREIGN MATTER AND/OR PERMIT LIGHT TRANSMISSION IN OR TO THE OPTICAL SYSTEM.
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Manufacturer Information:
| 717612905-009 | 04939 | LOCKHEED MARTIN CORPORATION |
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Techincal Specification:
| CRITICALITY CODE JUSTIFICATION | RADC | | FSC APPLICATION DATA | OPTICAL SIGHTING AND RANGING EQUIPMENT-FIRE CONTROL | | LENGTH | 6.474 INCHES NOMINAL | | MATERIAL | SELENIUM AND ZINC LOCATION NOT OTHERWISE SPECIFIED | | POLISHED PERIPHERY | NOT PROVIDED | | RADIOACTIVE CONTENT | CONTAINS RADIOACTIVE MATERIAL | | SPECIAL FEATURES | HAZARDOUS MATERIAL: WINDOW HAS AN ANTI-REFLECTIVE COATING CONTAINING .5043 GRAMS OF THORIUM TETRAFLUORIDE. THE TOTAL AMOUNT OF THORIUM 232 IN THE COATING IS .3802 GRAMS, THE RESULTANT ACTIVITY OF A SINGLE WINDOW IS 4.18 X 10 TO THE MINUS 8 POWER CURIES | | THICKNESS | 0.321 INCHES MINIMUM AND 0.329 INCHES MAXIMUM | | WIDTH | 4.807 INCHES NOMINAL |
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