NSN 1240-00-121-0797

Part Details | OPTICAL ELEMENT RETAINER

1240-00-121-0797 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: 8289250, 1240-00-121-0797, 00-121-0797, 1240001210797, 001210797

Supply Group (FSG) NSN Assigned NIIN Item Name Code (INC)
12OCT 23, 196800-121-079722451 ( RETAINER, OPTICAL ELEMENT )
REFERENCE DRAWINGS & PICTURES

RECESSED

Cross Reference | NSN 1240-00-121-0797
Part Number Cage Code Manufacturer
828925019200US ARMY ARDEC RDECOM
Technical Data | NSN 1240-00-121-0797
Characteristic Specifications
STYLE DESIGNATOR RECESSED
HOLE DIAMETER1.450 INCHES MINIMUM AND 1.460 INCHES MAXIMUM
OVERALL LENGTH0.090 INCHES MINIMUM AND 0.100 INCHES MAXIMUM
RECESS ANGLE IN DEG90.0
RECESS DEPTH0.070 INCHES NOMINAL
THREAD SIZE1.688 IN.-32UNS-2A
MATERIAL DOCUMENT AND CLASSIFICATIONBWW-T-700 TO 3$BQQ-A-225 TO 6$JDCMIL-C-11866, COMP 3, T6$DQQ-A-200 TO 8$DQQ-A-225 TO 8$DQQ-A-250 TO 11, T6 AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) 1ST MATERIAL RESPONSE
MATERIAL4$DAL0045$DAL6061$DAL6062
SURFACE TREATMENT ANODIZE
DRIVE TYPE SLOTTED
HOLE OR SLOT QUANTITY2
WIDTH0.062 INCHES MINIMUM AND 0.078 INCHES MAXIMUM
DEPTH0.030 INCHES MINIMUM AND 0.040 INCHES MAXIMUM
DRIVE FACILITY ANGULAR SPACING IN DEG180.0
INTERNAL ANNULAR SERRATION NOT PROVIDED
GUIDE DESIGN THREAD CHAMFER
GUIDE LOCATION BOTH EDGES
SETSCREW NOTCH NOT PROVIDED
FSC APPLICATION DATAPERISCOPE,TANK M32,M32C