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National Stock Number:
6650-01-171-2838
Federal Supply Class:
6650
National Item Identification Number:
011712838
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:
| 13074813 | 04939 | LOCKHEED MARTIN CORPORATION | | 13074813 | 58260 | PROGRAM MANAGER ADVANCED ATTACK HELICOPTER BARCOM AMCPM-AAH |
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Techincal Specification:
| BODY OUTSIDE DIAMETER | 1.799 INCHES MAXIMUM | | OVERALL LENGTH | 0.182 INCHES MINIMUM AND 0.183 INCHES MAXIMUM | | MATERIAL DOCUMENT AND CLASSIFICATION | ASTM A582,TYPE 416 ASSN STD SINGLE MATERIAL RESPONSE | | MATERIAL | STEEL COMP 416 | | STRAIGHT BORE DEPTH | 0.085 INCHES MINIMUM AND 0.115 INCHES MAXIMUM | | STRAIGHT BORE INSIDE DIAMETER | 1.700 INCHES NOMINAL | | STYLE DESIGNATOR | SPACER | | TAPER ANGLE | 28.5 DEGREES NOMINAL |
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