The Window,observation, cataloged under National Stock Number 9340-01-442-1654, is classified within Federal Supply Class 9340 (Glass Fabricated Materials) of the Nonmetallic Fabricated Materials group. The manufacturer of record is Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp. Government technical data includes 5 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 9340-01-442-1654 |
| Primary Part Number | 878010 REV AK ITEM NO. 225 |
| Item Name | Window,observation |
| FSC / FSG | 9340 / 93 — Glass Fabricated Materials |
| Manufacturer | Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp |
| Status | ACTIVE |
| Overall Diameter | 10.000 INCHES NOMINAL IN |
| Overall Thickness | 0.938 INCHES NOMINAL IN |
| Material Transparency | TRANSLUCENT |
| Style Designator | CIRCULAR |
| Material | PLASTIC |
| 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 |
|---|---|
| 878010 REV AK ITEM NO. 225 | Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp (USA) |
| Reference | Meaning |
|---|---|
| 10-1921-1 | 5/9 Secondary reference L3 Technologies, Inc. |
| 10-1921 | 3/9 Design control — primary reference L3 Technologies, Inc. |
NSN 9340-01-442-1654 is a Window,observation, manufactured by Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp, classified under FSC 9340, Glass Fabricated Materials. Status: active.
NSN 9340-01-442-1654 has 1 manufacturer part number on file: 878010 REV AK ITEM NO. 225 (Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp).
1 possible match (shared part number, not a government interchangeability claim): 1560-01-551-5757. Verify interchangeability with system specifications before substitution.
Key specifications for 878010 REV AK ITEM NO. 225: Overall Diameter: 10.000 INCHES NOMINAL IN; Overall Thickness: 0.938 INCHES NOMINAL IN; Material Transparency: TRANSLUCENT; Style Designator: CIRCULAR. 5 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.