The Cell,optical Element, cataloged under National Stock Number 1240-00-152-6754, 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 9 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 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 | 1240-00-152-6754 |
| Primary Part Number | 687543 |
| 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 |
| Overall Diameter | 2.588 INCHES NOMINAL IN |
| Eccentric Construction | NOT PROVIDED |
| Thread Length | 0.345 INCHES IN |
| Thread Location | INTERNAL |
| Chamfer Location | THREADED END |
| Chamfer Size | 0.025 IN. BY 45 DEG IN |
| Thread Size | 1 15/16-32 |
| Screw Thread Series Designator | UNS |
| 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 |
NSN 1240-00-152-6754 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 1240-00-152-6754 has 2 manufacturer part numbers on file: 687543 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), 806636 (Lockheed Martin Corporation Div Rms - Mitchel Field).
2 possible matches (shared part number, not a government interchangeability claim): 1620-00-485-6581, 3110-01-372-1371. Verify interchangeability with system specifications before substitution.
Key specifications for 687543: Overall Diameter: 2.588 INCHES NOMINAL IN; Eccentric Construction: NOT PROVIDED; Overall Length: 0.905 INCHES NOMINAL IN; Thread Length: 0.345 INCHES IN. 9 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 1240-00-152-6754 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.