NSN 5855-01-039-2851
Part Details | OPTICAL ELEMENT RETAINER
5855-01-039-2851 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: SMD850323, SM-D-850323, SMD850323, SM-D-850323, 5855-01-039-2851, 01-039-2851, 5855010392851, 010392851
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 58 | APR 17, 1977 | 01-039-2851 | 22451 ( RETAINER, OPTICAL ELEMENT ) |
REFERENCE DRAWINGS & PICTURES
SHOULDERED
Cross Reference | NSN 5855-01-039-2851
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| SM-D-850323 | 80063 | US ARMY COMMUNICATIONS &ELECTRONICS MATERIEL READINESS |
| SM-D-850323 | 20723 | VALCORE MANUFACTURING LLCDBA USE CAGE CODE 04YE2 FOR |
Technical Data | NSN 5855-01-039-2851
| Characteristic | Specifications |
|---|---|
| STYLE DESIGNATOR | SHOULDERED |
| SHOULDER LENGTH | 0.365 INCHES MINIMUM AND 0.375 INCHES MAXIMUM |
| TAPERED HOLE MINOR DIAMETER | 3.120 INCHES MINIMUM AND 3.130 INCHES MAXIMUM |
| TAPER ANGLE IN DEG | 7.0 |
| OVERALL LENGTH | 0.734 INCHES MINIMUM AND 0.744 INCHES MAXIMUM |
| FLANGE DIAMETER | 3.495 INCHES MINIMUM AND 3.505 INCHES MAXIMUM |
| SHOULDER THREAD SIZE | 3.380 IN.-32 |
| MATERIAL | ALUMINUM ALLOY 6061 |
| DRIVE TYPE | DRILLED HOLE |
| HOLE OR SLOT QUANTITY | 3 |
| DIAMETER | 0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM |
| DRIVE FACILITY ANGULAR SPACING IN DEG | 120.0 |
| RADIUS FROM GEOMETRIC AXIS TO HOLE CENTER | 1.585 INCHES NOMINAL |
| INTERNAL ANNULAR SERRATION | NOT PROVIDED |
| GUIDE DESIGN | THREAD RELIEF |
| SETSCREW NOTCH | NOT PROVIDED |
| FSC APPLICATION DATA | NIGHT VISION EQUIPMENT |
| END ITEM IDENTIFICATION | 5855-01-039-2850 OBJECTIVE ASSY |