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National Stock Number:
1240-00-210-4396
Federal Supply Class:
1240
National Item Identification Number:
002104396
Description:
RETAINER,OPTICAL ELEMENT
Detail:
A cylindrical, externally threaded item having a centrally located hole specifically designed to retain by means of either a raised box (shoulder), or counterbore, countersink, or a similar shaped recess, an optical element such as a lens, reticle, cell, and the like, in optical assemblies. It must have drilled holes or slots to facilitate assembly and disassembly. For items which house the optical element(s), and form the internal or central portions of an optical system, see CELL, OPTICAL ELEMENT. Excludes RING, EXTERNALLY THREADED.
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Manufacturer Information:
| 1390118 | 10001 | NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER | | 789PC4 | 02622 | AMERICAN OPTICAL CO | | 789PC4 | 78039 | LEICA INC SURVEYING AND PHOTOGRAMMETRY SYSTEMS DIV |
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Techincal Specification:
| DRIVE TYPE | DRILLED HOLE | | DRIVE FACILITY ANGULAR SPACING IN DEG | 90.0 | | DEPTH | 0.250 INCHES NOMINAL | | DIAMETER | 0.079 INCHES NOMINAL | | GUIDE DESIGN | THREAD CHAMFER | | GUIDE LOCATION | BOTH EDGES | | HOLE CHAMFER ANGLE IN DEG | 0.0 | | HOLE CHAMFER DIAMETER | 1.457 INCHES MINIMUM AND 1.462 INCHES MAXIMUM | | HOLE DIAMETER | 1.457 INCHES MINIMUM AND 1.462 INCHES MAXIMUM | | HOLE OR SLOT QUANTITY | 4 | | INTERNAL ANNULAR SERRATION | NOT PROVIDED | | OVERALL LENGTH | 0.247 INCHES MINIMUM AND 0.253 INCHES MAXIMUM | | MATERIAL | ALUMINUM ALLOY | | RADIUS FROM GEOMETRIC AXIS TO HOLE CENTER | 0.856 INCHES MINIMUM AND 0.862 INCHES MAXIMUM | | RECESS DIAMETER | 1.541 INCHES MINIMUM AND 1.543 INCHES MAXIMUM | | RECESS DEPTH | 0.122 INCHES MINIMUM AND 0.128 INCHES MAXIMUM | | SETSCREW NOTCH | NOT PROVIDED | | STYLE DESIGNATOR | RECESSED | | THREAD SIZE | 1.874 IN.-32 |
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