The Window,optical Instrument, cataloged under National Stock Number 1240-01-186-1796, is classified within Federal Supply Class 1240 (Optical Sighting and Ranging Equipment) of the Fire Control Equipment group. The manufacturer of record is Lockheed Martin Corp Electronics and Missiles Div. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1240-01-186-1796 |
| Primary Part Number | 242387 |
| Item Name | Window,optical Instrument |
| FSC / FSG | 1240 / 12 — Optical Sighting and Ranging Equipment |
| Manufacturer | Lockheed Martin Corp Electronics and Missiles Div |
| Status | ACTIVE |
| Length | 6.712 INCHES NOMINAL IN |
| Criticality Code Justification | FEAT |
| Polished Periphery | NOT PROVIDED |
| Width | 6.461 INCHES NOMINAL IN |
| Material | GLASS OPTICAL LOCATION NOT OTHERWISE SPECIFIED |
| Thickness | 0.390 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| 242387 | Applied Biosystems, Llc Dba Life Technologies (USA) |
| 242387 | Coherent Aerospace & Defense, Inc. (USA) |
| 242387 | Goodrich Corporation Dba Goodrich Optical Space Systems Div Isr (USA) |
| 242387 PRIMARY | Lockheed Martin Corp Electronics and Missiles Div (USA) |
NSN 1240-01-186-1796 is a Window,optical Instrument, manufactured by Lockheed Martin Corp Electronics and Missiles Div, classified under FSC 1240, Optical Sighting and Ranging Equipment. Status: active.
NSN 1240-01-186-1796 has 4 manufacturer part numbers on file: 242387 (Applied Biosystems, Llc Dba Life Technologies), 242387 (Coherent Aerospace & Defense, Inc.), 242387 (Goodrich Corporation Dba Goodrich Optical Space Systems Div Isr), 242387 (Lockheed Martin Corp Electronics and Missiles Div).
Key specifications for 242387: Length: 6.712 INCHES NOMINAL IN; Criticality Code Justification: FEAT; Polished Periphery: NOT PROVIDED; Special Features: WEAPON SYSTEM ESSENTIAL. 6 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 1240-01-186-1796 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.