The Cell,optical Element, cataloged under National Stock Number 1240-00-159-0513, is classified within Federal Supply Class 1240 (Optical Sighting and Ranging Equipment) of the Fire Control Equipment group. The manufacturer of record is Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1240-00-159-0513 |
| Primary Part Number | 654768 |
| Item Name | Cell,optical Element |
| FSC / FSG | 1240 / 12 — Optical Sighting and Ranging Equipment |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| Element Securing Method | INTERNAL THREAD |
| Overall Diameter | 1.750 INCHES NOMINAL IN |
| Drive Type | SLOTTED FACE |
| Eccentric Construction | NOT PROVIDED |
| Thread Length | 0.563 INCHES AND 0.343 INCHES IN |
| Thread Location | EXTERNAL AND INTERNAL |
| Chamfer Location | DRIVE END |
| Thread Direction | RIGHT-HAND |
| Thread Size | 1 3/4-32 AND 1 1/2-32 |
| Screw Thread Series Designator | UNS |
| Thread Class | 2A AND 2B A |
| Material | ALUMINUM ALLOY |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 654768 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| Reference | Meaning |
|---|---|
| 265606 | 5/9 Secondary reference Lockheed Martin Corporation Div Rms - Mitchel Field |
NSN 1240-00-159-0513 is a Cell,optical Element, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 1240, Optical Sighting and Ranging Equipment. Status: active.
NSN 1240-00-159-0513 has 1 manufacturer part number on file: 654768 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
2 possible matches (shared part number, not a government interchangeability claim): 5940-00-908-1729, 4140-01-530-5973. Verify interchangeability with system specifications before substitution.
Key specifications for 654768: Element Securing Method: INTERNAL THREAD; Overall Diameter: 1.750 INCHES NOMINAL IN; Drive Type: SLOTTED FACE; Eccentric Construction: NOT PROVIDED. 12 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 1240-00-159-0513 has DEMIL Code D. Demilitarization may be required before disposal or transfer to non-military entities.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.