NSN 1240-00-210-4396

Part Details | OPTICAL ELEMENT RETAINER

1240-00-210-4396 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: 789PC4, 789PC4, 1390118, 1240-00-210-4396, 00-210-4396, 1240002104396, 002104396

Supply Group (FSG) NSN Assigned NIIN Item Name Code (INC)
12JAN 01, 196300-210-439622451 ( RETAINER, OPTICAL ELEMENT )
REFERENCE DRAWINGS & PICTURES

RECESSED

Cross Reference | NSN 1240-00-210-4396
Part Number Cage Code Manufacturer
789PC402622AMERICAN OPTICAL CO
789PC478039LEICA INCSURVEYING AND PHOTOGRAMMETRY SYSTEMS
139011810001NAVAIR AND NAVSEA MANAGEDORIGINAL DESIGN ACTIVITY DWG NOT
Technical Data | NSN 1240-00-210-4396
Characteristic Specifications
STYLE DESIGNATOR RECESSED
HOLE DIAMETER1.457 INCHES MINIMUM AND 1.462 INCHES MAXIMUM
OVERALL LENGTH0.247 INCHES MINIMUM AND 0.253 INCHES MAXIMUM
RECESS DIAMETER1.541 INCHES MINIMUM AND 1.543 INCHES MAXIMUM
RECESS DEPTH0.122 INCHES MINIMUM AND 0.128 INCHES MAXIMUM
THREAD SIZE1.874 IN.-32
HOLE CHAMFER ANGLE IN DEG0.0
HOLE CHAMFER DIAMETER1.457 INCHES MINIMUM AND 1.462 INCHES MAXIMUM
MATERIAL ALUMINUM ALLOY
DRIVE TYPE DRILLED HOLE
HOLE OR SLOT QUANTITY4
DIAMETER0.079 INCHES NOMINAL
DEPTH0.250 INCHES NOMINAL
DRIVE FACILITY ANGULAR SPACING IN DEG90.0
RADIUS FROM GEOMETRIC AXIS TO HOLE CENTER0.856 INCHES MINIMUM AND 0.862 INCHES MAXIMUM
INTERNAL ANNULAR SERRATION NOT PROVIDED
GUIDE DESIGN THREAD CHAMFER
GUIDE LOCATION BOTH EDGES
SETSCREW NOTCH NOT PROVIDED
END ITEM IDENTIFICATIONTELESCOPE