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National Stock Number:
1240-00-864-0352
Federal Supply Class:
1240
National Item Identification Number:
008640352
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:
| 8615899 | 19200 | US ARMY ARDEC RDECOM |
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Techincal Specification:
| COUNTERBORE TAPER ANGLE IN DEG | 30.0 | | DEPTH | 0.057 INCHES NOMINAL | | DRIVE FACILITY ANGULAR SPACING IN DEG | 180.0 | | DRIVE TYPE | SLOTTED | | FSC APPLICATION DATA | TELESCOPE,ELBOW,T176 INTEGRATED WITH FIRE CONTROL EQUIPMENT | | GUIDE DESIGN | THREAD RELIEF | | GUIDE LOCATION | BOTH EDGES | | HOLE CHAMFER ANGLE IN DEG | 45.0 | | HOLE CHAMFER DIAMETER | 1.770 INCHES NOMINAL | | HOLE DIAMETER | 1.550 INCHES MINIMUM AND 1.560 INCHES MAXIMUM | | HOLE OR SLOT QUANTITY | 2 | | INTERNAL ANNULAR SERRATION | NOT PROVIDED | | MATERIAL DOCUMENT AND CLASSIFICATION | WW-T-785, T3, TYPE 1-CANCELED FED SPEC SINGLE MATERIAL RESPONSE | | MATERIAL | ALUMINUM ALLOY 2024 | | OVERALL LENGTH | 2.000 INCHES NOMINAL | | RECESS DEPTH | 1.440 INCHES NOMINAL | | RECESS DIAMETER | 1.880 INCHES MINIMUM AND 1.890 INCHES MAXIMUM | | SETSCREW NOTCH | PROVIDED | | STYLE DESIGNATOR | RECESSED | | SURFACE TREATMENT | ANODIZE | | THREAD SIZE | 1.812 IN.-32 NS-2 | | WIDTH | 0.057 INCHES NOMINAL |
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