NSN 1240-00-420-9123

Part Details | OPTICAL ELEMENT RETAINER

1240-00-420-9123 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.

Alternate Parts: 1240004209123, 10541928, 1240-00-420-9123, 00-420-9123, 1240004209123, 004209123

Supply Group (FSG) NSN Assigned NIIN Item Name Code (INC)
12MAR 12, 196900-420-912322451 ( RETAINER, OPTICAL ELEMENT )
REFERENCE DRAWINGS & PICTURES

SHOULDERED

Cross Reference | NSN 1240-00-420-9123
Part Number Cage Code Manufacturer
1240004209123SCY13E.C.A ETABLISSEMENTCENTRALD'APPROVISIONNEMENT DES
1054192819200US ARMY ARDEC RDECOM
Technical Data | NSN 1240-00-420-9123
Characteristic Specifications
STYLE DESIGNATOR SHOULDERED
SHOULDER LENGTH0.313 INCHES MINIMUM AND 0.344 INCHES MAXIMUM
TAPERED HOLE MINOR DIAMETER1.000 INCHES MINIMUM AND 1.005 INCHES MAXIMUM
TAPER ANGLE IN DEG10.5
OVERALL LENGTH0.422 INCHES MINIMUM AND 0.438 INCHES MAXIMUM
FLANGE DIAMETER1.328 INCHES MINIMUM AND 1.344 INCHES MAXIMUM
SHOULDER THREAD SIZE1.188 IN.-32UNS-2A
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-M-14, TYPE MFE MIL SPEC SINGLE MATERIAL RESPONSE
MATERIAL PLASTIC PHENOLIC AND SILICA
DRIVE TYPE SLOTTED
HOLE OR SLOT QUANTITY2
WIDTH0.060 INCHES MINIMUM AND 0.070 INCHES MAXIMUM
DEPTH0.060 INCHES MINIMUM AND 0.070 INCHES MAXIMUM
DRIVE FACILITY ANGULAR SPACING IN DEG180.0
INTERNAL ANNULAR SERRATION NOT PROVIDED
SETSCREW NOTCH NOT PROVIDED
SPECIAL FEATURESGROOVE ADJACENT TO SHOULDER THREAD,0.047 IN. W,0.047 IN. DEEP.
FSC APPLICATION DATAPERISCOPE,TANK M32,M32C,M35,M36