The Window,observation, cataloged under National Stock Number 9340-00-409-4989, is classified within Federal Supply Class 9340 (Glass Fabricated Materials) of the Nonmetallic Fabricated Materials group. Government technical data includes 7 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 9340-00-409-4989 |
| Item Name | Window,observation |
| FSC / FSG | 9340 / 93 — Glass Fabricated Materials |
| Status | ACTIVE |
| FSC Application Data | FUSELAGE,AIRFRAME |
| Surface Finish | FINE FINISHED |
| Material Transparency | CLEAR |
| Features Provided | TEMPERED |
| Edge Type | BEVELED |
| Environmental Protection | VIBRATION PROOF |
| Material | GLASS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 216-40443-1 | 3/2 Design control — primary reference U.S. Government activity |
| PL216-40443 | 5/2 Secondary reference U.S. Government activity |
NSN 9340-00-409-4989 is a Window,observation, classified under FSC 9340, Glass Fabricated Materials. Status: active.
Key specifications for 9340-00-409-4989: FSC Application Data: FUSELAGE,AIRFRAME; Surface Finish: FINE FINISHED; Material Transparency: CLEAR; Features Provided: TEMPERED. 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.
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.