The Window,optical Instrument, cataloged under National Stock Number 1240-01-118-9964, is classified within Federal Supply Class 1240 (Optical Sighting and Ranging Equipment) of the Fire Control Equipment group. The manufacturer of record is Us Army Aviation and Missile Command. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1240-01-118-9964 |
| Primary Part Number | 12293803 |
| Item Name | Window,optical Instrument |
| FSC / FSG | 1240 / 12 — Optical Sighting and Ranging Equipment |
| Manufacturer | Us Army Aviation and Missile Command |
| Status | ACTIVE |
| Surface Finish | GROUND AND POLISHED |
| Material Document and Classification | MIL-G-174, CLASS 1, GRADE B MIL SPEC SINGLE MATERIAL RESPONSE LOCATION NOT OTHERWISE SPECIFIED |
| Diameter | 2.360 INCHES MINIMUM AND 2.364 INCHES MAXIMUM IN |
| Polished Periphery | NOT PROVIDED |
| Material | GLASS OPTICAL LOCATION NOT OTHERWISE SPECIFIED |
| Polished Surface | BOTH |
| Thickness | 0.250 INCHES NOMINAL IN |
| 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 |
|---|---|
| 12293803 PRIMARY | Us Army Aviation and Missile Command (USA) |
| 12293803 | Seiler Instrument and Manufacturing Company, Incorporated (USA) |
| 12293803 | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 12293803 | 5/1 Secondary reference U.S. Government activity |
NSN 1240-01-118-9964 is a Window,optical Instrument, manufactured by Us Army Aviation and Missile Command, classified under FSC 1240, Optical Sighting and Ranging Equipment. Status: active.
NSN 1240-01-118-9964 has 3 manufacturer part numbers on file: 12293803 (Us Army Aviation and Missile Command), 12293803 (Seiler Instrument and Manufacturing Company, Incorporated), 12293803 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 12293803: Surface Finish: GROUND AND POLISHED; Material Document and Classification: MIL-G-174, CLASS 1, GRADE B MIL SPEC SINGLE MATERIAL RESPONSE LOCATION NOT OTHERWISE SPECIFIED; Diameter: 2.360 INCHES MINIMUM AND 2.364 INCHES MAXIMUM IN; Polished Periphery: NOT PROVIDED. 7 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 1240-01-118-9964 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.