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National Stock Number:
1240-00-641-0661
Federal Supply Class:
1240
National Item Identification Number:
006410661
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:
| 189658PC11 | 10001 | NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER | | 189658PC11 | 14001 | GRAYCO OPTICAL CORP |
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Techincal Specification:
| DIAMETER | 36.000 MILLIMETERS NOMINAL | | FSC APPLICATION DATA | RANGEFINDER MK 42,ALL MODS | | MATERIAL DOCUMENT AND CLASSIFICATION | JAN-G-174, TYPE 517-645, GRADE C MIL SPEC SINGLE MATERIAL RESPONSE | | MATERIAL | GLASS OPTICAL | | POLISHED PERIPHERY | NOT PROVIDED | | POLISHED SURFACE | BOTH | | REFLECTION REDUCING SURFACE | BOTH | | REFRACTION INDEX | 1.5170 NOMINAL | | THICKNESS | 4.000 MILLIMETERS NOMINAL |
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