The Window,observation, cataloged under National Stock Number 9340-01-252-6604, is classified within Federal Supply Class 9340 (Glass Fabricated Materials) of the Nonmetallic Fabricated Materials group. Government technical data includes 6 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 9340-01-252-6604 |
| Item Name | Window,observation |
| FSC / FSG | 9340 / 93 — Glass Fabricated Materials |
| Status | ACTIVE |
| Overall Diameter | 2.123 INCHES NOMINAL IN |
| Surface Finish | POLISHED |
| Overall Thickness | 1.250 INCHES NOMINAL IN |
| Style Designator | CIRCULAR |
| Material Document and Classification | MIL-G-2697 MIL SPEC SINGLE MATERIAL RESPONSE |
| 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 |
|---|---|
| 801-6640825 PC 18 | C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command |
| 2621-702-03 PIECE 18 | 3/2 Design control — primary reference U.S. Government activity |
| 2633-702-01 PC 18 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 9340-01-252-6604 is a Window,observation, classified under FSC 9340, Glass Fabricated Materials. Status: active.
Key specifications for 9340-01-252-6604: Overall Diameter: 2.123 INCHES NOMINAL IN; Surface Finish: POLISHED; Overall Thickness: 1.250 INCHES NOMINAL IN; Style Designator: CIRCULAR. 6 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.