The Window,observation, cataloged under National Stock Number 9340-00-563-3840, is classified within Federal Supply Class 9340 (Glass Fabricated Materials) of the Nonmetallic Fabricated Materials 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 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 9340-00-563-3840 |
| Primary Part Number | 8171772 |
| Item Name | Window,observation |
| FSC / FSG | 9340 / 93 — Glass Fabricated Materials |
| Manufacturer | Us Army Aviation and Missile Command |
| Status | ACTIVE |
| Overall Diameter | 1.703 INCHES MINIMUM AND 1.719 INCHES MAXIMUM IN |
| Surface Finish | POLISHED |
| Overall Thickness | 0.087 INCHES MINIMUM AND 0.100 INCHES MAXIMUM IN |
| Material Transparency | CLEAR |
| Style Designator | CIRCULAR |
| Ply Quantity | 1 |
| 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 |
| Part Number | Manufacturer |
|---|---|
| 8171772 PRIMARY | Us Army Aviation and Missile Command (USA) |
| Reference | Meaning |
|---|---|
| 8171772 | 5/9 Secondary reference Lucent Technologies Inc Advanced Technology Systems |
NSN 9340-00-563-3840 is a Window,observation, manufactured by Us Army Aviation and Missile Command, classified under FSC 9340, Glass Fabricated Materials. Status: active.
NSN 9340-00-563-3840 has 1 manufacturer part number on file: 8171772 (Us Army Aviation and Missile Command).
1 possible match (shared part number, not a government interchangeability claim): 5365-01-368-5193. Verify interchangeability with system specifications before substitution.
Key specifications for 8171772: Overall Diameter: 1.703 INCHES MINIMUM AND 1.719 INCHES MAXIMUM IN; Surface Finish: POLISHED; Overall Thickness: 0.087 INCHES MINIMUM AND 0.100 INCHES MAXIMUM IN; Material Transparency: CLEAR. 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.