The Window,observation, cataloged under National Stock Number 9340-00-641-0791, is classified within Federal Supply Class 9340 (Glass Fabricated Materials) of the Nonmetallic Fabricated Materials group. The manufacturer of record is Lockheed Martin Corporation Div Rms - Mitchel Field. Government technical data includes 9 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 9340-00-641-0791 |
| Primary Part Number | 244495 |
| Item Name | Window,observation |
| FSC / FSG | 9340 / 93 — Glass Fabricated Materials |
| Manufacturer | Lockheed Martin Corporation Div Rms - Mitchel Field |
| Status | ACTIVE |
| Fourth Corner Radius | 1.000 INCHES NOMINAL IN |
| First Corner Radius | 1.000 INCHES NOMINAL IN |
| Second Corner Radius | 1.000 INCHES NOMINAL IN |
| Overall Thickness | 0.375 INCHES MINIMUM AND 0.406 INCHES MAXIMUM IN |
| Material Transparency | CLEAR |
| Style Designator | ROUNDED CORNERS |
| Edge Type | BEVELED |
| Material | GLASS CROWN |
| Third Corner Radius | 1.000 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 244495 PRIMARY | Lockheed Martin Corporation Div Rms - Mitchel Field (USA) |
| Reference | Meaning |
|---|---|
| 655364 | 5/9 Secondary reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| 417164PC4 | 3/9 Design control — primary reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
NSN 9340-00-641-0791 is a Window,observation, manufactured by Lockheed Martin Corporation Div Rms - Mitchel Field, classified under FSC 9340, Glass Fabricated Materials. Status: active.
NSN 9340-00-641-0791 has 1 manufacturer part number on file: 244495 (Lockheed Martin Corporation Div Rms - Mitchel Field).
1 possible match (shared part number, not a government interchangeability claim): 5961-01-086-1426. Verify interchangeability with system specifications before substitution.
Key specifications for 244495: Fourth Corner Radius: 1.000 INCHES NOMINAL IN; First Corner Radius: 1.000 INCHES NOMINAL IN; Second Corner Radius: 1.000 INCHES NOMINAL IN; Overall Thickness: 0.375 INCHES MINIMUM AND 0.406 INCHES MAXIMUM 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.
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.