The Window,optical Instrument, cataloged under National Stock Number 1240-01-449-4059, is classified within Federal Supply Class 1240 (Optical Sighting and Ranging Equipment) of the Fire Control Equipment group. The manufacturer of record is General Dynamics Land Systems Inc. Div Gdls Global Llc. Government technical data includes 7 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1240-01-449-4059 |
| Primary Part Number | 16100386-001 |
| Item Name | Window,optical Instrument |
| FSC / FSG | 1240 / 12 — Optical Sighting and Ranging Equipment |
| Manufacturer | General Dynamics Land Systems Inc. Div Gdls Global Llc |
| Status | ACTIVE |
| Length | 4.865 INCHES NOMINAL IN |
| Material Document and Classification | MIL-G-174, CLASS 1, GRADE C MIL SPEC SINGLE MATERIAL RESPONSE LOCATION NOT OTHERWISE SPECIFIED |
| Polished Periphery | NOT PROVIDED |
| Width | 3.052 INCHES NOMINAL IN |
| Material | GLASS OPTICAL LOCATION NOT OTHERWISE SPECIFIED |
| Polished Surface | BOTH |
| Thickness | 0.250 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 16100386-001 PRIMARY | General Dynamics Land Systems Inc. Div Gdls Global Llc (USA) |
| 16100386-001 PRIMARY | General Dynamics Land Systems Inc. (USA) |
NSN 1240-01-449-4059 is a Window,optical Instrument, manufactured by General Dynamics Land Systems Inc. Div Gdls Global Llc, classified under FSC 1240, Optical Sighting and Ranging Equipment. Status: active.
NSN 1240-01-449-4059 has 2 manufacturer part numbers on file: 16100386-001 (General Dynamics Land Systems Inc. Div Gdls Global Llc), 16100386-001 (General Dynamics Land Systems Inc.).
Key specifications for 16100386-001: Length: 4.865 INCHES NOMINAL IN; Material Document and Classification: MIL-G-174, CLASS 1, GRADE C MIL SPEC SINGLE MATERIAL RESPONSE LOCATION NOT OTHERWISE SPECIFIED; Polished Periphery: NOT PROVIDED; Width: 3.052 INCHES NOMINAL IN. 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 1240-01-449-4059 has DEMIL Code B. 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.