NSN 1240-01-291-7137
Part Details | OPTICAL ELEMENT RETAINING RING
1240-01-291-7137 A cylindrical item having an internally flanged diameter designed to retain a lens or window in the objective end, or a diopter scale at the viewing end of an optical instrument. It may have one or more of the following characteristics: internal thread or machined for a press fit, method of securing, and/or knurled periphery. For externally threaded items, see RETAINER, OPTICAL ELEMENT. Excludes CELL, OPTICAL ELEMENT; NUT, PLAIN KNURLED; NUT, PLAIN ROUND; and RING, RETAINING.
Alternate Parts: 717511336009, 717511336-009, 717511333001, 717511333-001, 717511336009, 717511336-009, 1240-01-291-7137, 01-291-7137, 1240012917137, 012917137
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 12 | JAN 04, 1989 | 01-291-7137 | 22585 ( RING, RETAINING, OPTICAL ELEMENT ) |
REFERENCE DRAWINGS & PICTURES
Cross Reference | NSN 1240-01-291-7137
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 717511336-009 | 04939 | LOCKHEED MARTIN CORPORATIONDBA LOCKHEED MARTIN |
| 717511333-001 | 04939 | LOCKHEED MARTIN CORPORATIONDBA LOCKHEED MARTIN |
| 717511336-009 | 61999 | MB AEROSPACE STERLING HEIGHTS, INC. |
Technical Data | NSN 1240-01-291-7137
| Characteristic | Specifications |
|---|---|
| THREAD LOCATION | INTERNAL |
| THREAD SIZE | 4 11/64-28 |
| SCREW THREAD SERIES DESIGNATOR | UNS |
| THREAD CLASS | 2B |
| THREAD PITCH DIAMETERS | +4.1313 TO +4.1700 INCHES |
| THREAD DIRECTION | RIGHT-HAND |
| OVERALL LENGTH | 0.450 INCHES NOMINAL |
| OUTSIDE DIAMETER | 4.290 INCHES NOMINAL |
| INTERNAL FLANGE THICKNESS | 0.063 INCHES NOMINAL |
| INNER GROOVE WIDTH | 0.0500 INCHES NOMINAL |
| GROOVE DIAMETER | 4.180 INCHES NOMINAL |
| APERTURE DIAMETER | 3.917 INCHES NOMINAL |
| GROOVE LOCATION | ADJACENT TO INTERNAL FLANGE |
| END ITEM IDENTIFICATION | LANTIRN TARGET PROJECT |