NSN 5855-01-039-2857
Part Details | OPTICAL ELEMENT RETAINER
5855-01-039-2857 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: SMD850409, SM-D-850409, SMD850409, SMD850409, SM-D-850409, 5855-01-039-2857, 01-039-2857, 5855010392857, 010392857
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 58 | APR 17, 1977 | 01-039-2857 | 22451 ( RETAINER, OPTICAL ELEMENT ) |
REFERENCE DRAWINGS & PICTURES
SHOULDERED
Cross Reference | NSN 5855-01-039-2857
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| SM-D-850409 | 34671 | A-I-K INC |
| SMD850409 | 2S308 | FREEHOLD MANUFACTURING ASSEMBLY COINC |
| SM-D-850409 | 80063 | US ARMY COMMUNICATIONS &ELECTRONICS MATERIEL READINESS |
Technical Data | NSN 5855-01-039-2857
| Characteristic | Specifications |
|---|---|
| STYLE DESIGNATOR | SHOULDERED |
| SHOULDER LENGTH | 0.080 INCHES MINIMUM AND 0.090 INCHES MAXIMUM |
| HOLE DIAMETER | 1.437 INCHES MINIMUM AND 1.442 INCHES MAXIMUM |
| OVERALL LENGTH | 0.189 INCHES MINIMUM AND 0.199 INCHES MAXIMUM |
| FLANGE THREAD SIZE | 1.6875 IN.-32 |
| SHOULDER TAPER ANGLE IN DEG | 20.0 |
| TAPERED SHOULDER MINOR DIAMETER | 1.437 INCHES MINIMUM AND 1.442 INCHES MAXIMUM |
| MATERIAL | ALUMINUM ALLOY 6061 |
| DRIVE TYPE | DRILLED HOLE |
| HOLE OR SLOT QUANTITY | 4 |
| DIAMETER | 0.062 INCHES NOMINAL |
| DRIVE FACILITY ANGULAR SPACING IN DEG | 90.0 |
| RADIUS FROM GEOMETRIC AXIS TO HOLE CENTER | 0.765 INCHES MINIMUM AND 0.770 INCHES MAXIMUM |
| INTERNAL ANNULAR SERRATION | NOT PROVIDED |
| GUIDE DESIGN | THREAD CHAMFER |
| GUIDE LOCATION | DRIVE EDGE |
| SETSCREW NOTCH | NOT PROVIDED |
| END ITEM IDENTIFICATION | NIGHT VISION SIGHT AN/PVS-5 |