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National Stock Number:
1240-01-204-7772
Federal Supply Class:
1240
National Item Identification Number:
012047772
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:
| 13076119 | 04939 | LOCKHEED MARTIN CORPORATION | | 13076119 | 58260 | PROGRAM MANAGER ADVANCED ATTACK HELICOPTER BARCOM AMCPM-AAH |
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Techincal Specification:
| GUIDE DESIGN | THREAD CHAMFER | | GUIDE LOCATION | SHOULDER | | HOLE CHAMFER DIAMETER | 0.422 INCHES MINIMUM AND 0.426 INCHES MAXIMUM | | HOLE CHAMFER ANGLE IN DEG | 45.0 | | HOLE DIAMETER | 0.140 INCHES MINIMUM AND 0.146 INCHES MAXIMUM | | INTERNAL ANNULAR SERRATION | NOT PROVIDED | | OVERALL LENGTH | 2.240 INCHES MINIMUM AND 2.260 INCHES MAXIMUM | | MATERIAL | ALUMINUM ALLOY | | RECESS DEPTH | 0.268 INCHES MINIMUM AND 0.288 INCHES MAXIMUM | | RECESS DIAMETER | 1.740 INCHES MINIMUM AND 1.760 INCHES MAXIMUM | | SETSCREW NOTCH | NOT PROVIDED | | STYLE DESIGNATOR | RECESSED | | THREAD SIZE | 0.014 |
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