The Window,observation, cataloged under National Stock Number 9340-00-009-5664, 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. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 9340-00-009-5664 |
| Primary Part Number | A51B92934-11 |
| Item Name | Window,observation |
| FSC / FSG | 9340 / 93 — Glass Fabricated Materials |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Overall Diameter | 1.650 INCHES NOMINAL IN |
| Overall Thickness | 0.125 INCHES NOMINAL IN |
| Material Transparency | CLEAR |
| Style Designator | CIRCULAR |
| Edge Type | FLAT UNFINISHED |
| 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 |
|---|---|
| A51B92934-11 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| A51B92934-11 | 5/9 Secondary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems |
| A51B92934-11 | 3/9 Design control — primary reference Northrop Grumman Systems Corporation |
NSN 9340-00-009-5664 is a Window,observation, manufactured by Northrop Grumman Systems Corporation, classified under FSC 9340, Glass Fabricated Materials. Status: active.
NSN 9340-00-009-5664 has 1 manufacturer part number on file: A51B92934-11 (Northrop Grumman Systems Corporation).
Key specifications for A51B92934-11: Overall Diameter: 1.650 INCHES NOMINAL IN; Overall Thickness: 0.125 INCHES NOMINAL IN; Material Transparency: CLEAR; Style Designator: CIRCULAR. 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.