The Window,optical Instrument, cataloged under National Stock Number 1240-01-237-1583, is classified within Federal Supply Class 1240 (Optical Sighting and Ranging Equipment) of the Fire Control Equipment group. The manufacturer of record is Dept of the Army U S Army Electronics Command Night Vision Laboratory. Government technical data includes 2 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1240-01-237-1583 |
| Primary Part Number | 5006551 |
| Item Name | Window,optical Instrument |
| FSC / FSG | 1240 / 12 — Optical Sighting and Ranging Equipment |
| Manufacturer | Dept of the Army U S Army Electronics Command Night Vision Laboratory |
| Status | ACTIVE |
| Polished Periphery | NOT PROVIDED |
| Material | ALUMINUM ALLOY AND GLASS LOCATION NOT OTHERWISE SPECIFIED |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL F — Mutilate — Cut |
| Hazard | Hazardous per DLA record (HMIC Y) |
| Criticality Code | N |
| Part Number | Manufacturer |
|---|---|
| 5006551 PRIMARY | Dept of the Army U S Army Electronics Command Night Vision Laboratory (USA) |
NSN 1240-01-237-1583 is a Window,optical Instrument, manufactured by Dept of the Army U S Army Electronics Command Night Vision Laboratory, classified under FSC 1240, Optical Sighting and Ranging Equipment. Status: active.
NSN 1240-01-237-1583 has 1 manufacturer part number on file: 5006551 (Dept of the Army U S Army Electronics Command Night Vision Laboratory).
Key specifications for 5006551: Polished Periphery: NOT PROVIDED; Special Features: ITEM CONTAINS WINDOW MOUNT P/N 5006552;VISIBLE WINDOW P/N SM-D-804998;IR WINDOW P/N SM-D-805050;BAFFLE NO.1 P/N 5006553; End Item Identification: AN/VSG-2 (A) OPE,M60A3TTS,AN/VSG-2; Material: ALUMINUM ALLOY AND GLASS LOCATION NOT OTHERWISE SPECIFIED. 2 specifications are documented in the U.S. Government catalog.
Hazardous per DLA record (HMIC Y). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 1240-01-237-1583 has DEMIL Code F. 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.