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National Stock Number:
1240-01-319-6860
Federal Supply Class:
1240
National Item Identification Number:
013196860
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:
| 13077325-501 | 04939 | LOCKHEED MARTIN CORPORATION | | 13077325-501 | 58260 | PROGRAM MANAGER ADVANCED ATTACK HELICOPTER BARCOM AMCPM-AAH |
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Techincal Specification:
| GUIDE DESIGN | THREAD CHAMFER | | GUIDE LOCATION | BOTH EDGES | | INTERNAL ANNULAR SERRATION | NOT PROVIDED | | OVERALL LENGTH | 0.340 INCHES MINIMUM AND 0.360 INCHES MAXIMUM | | MATERIAL | ALUMINUM ALLOY | | RECESS DEPTH | 0.140 INCHES MINIMUM AND 0.160 INCHES MAXIMUM | | RECESS DIAMETER | 1.948 INCHES MINIMUM AND 1.952 INCHES MAXIMUM | | SETSCREW NOTCH | NOT PROVIDED | | STYLE DESIGNATOR | RECESSED | | THREAD SIZE | 2.125 IN.-40 |
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