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National Stock Number:
1240-01-079-8553
Federal Supply Class:
1240
National Item Identification Number:
010798553
Description:
SPACER,OPTICAL ELEMENT
Detail:
A TUBULAR SHAPED ITEM DESIGNED TO MAINTAIN A PREDETERMINED DISTANCE BETWEEN OPTICAL ELEMENTS, SUCH AS LENSES, RETICLES, AND THE LIKE. THE BORE MAY BE STRAIGHT, TAPERED OR COUNTERBORED, AND MAY HAVE ANNULAR SERRATIONS TO CONVERGE OR DIVERGE LIGHT RAYS. THE SURFACES, WHICH MATE WITH THE OPTICS, ARE USUALLY CHAMFERED, CONCAVE, AND/OR HAVE A SPECIFIED FINISH DESIGNATION IN THE RANGE OF 1 TO 125 MICROINCHES ARITHMETICAL AVERAGE (AA). SEE ALSO SPACER, SLEEVE AND CELL, OPTICAL ELEMENT.
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Manufacturer Information:
| 12266764-1 | 19207 | U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM |
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Techincal Specification:
| BODY OUTSIDE DIAMETER | 4.6755 INCHES MAXIMUM | | OVERALL LENGTH | 0.383 INCHES NOMINAL | | MATERIAL | ALUMINUM ALLOY | | STRAIGHT BORE INSIDE DIAMETER | 4.495 INCHES MINIMUM AND 4.505 INCHES MAXIMUM |
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