The Window,observation, cataloged under National Stock Number 9340-00-346-4407, is classified within Federal Supply Class 9340 (Glass Fabricated Materials) of the Nonmetallic Fabricated Materials group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 9340-00-346-4407 |
| Item Name | Window,observation |
| FSC / FSG | 9340 / 93 — Glass Fabricated Materials |
| Status | ACTIVE |
| Surface Finish | POLISHED |
| Overall Thickness | 0.250 INCHES NOMINAL IN |
| Material Transparency | CLEAR |
| Style Designator | SQUARE CORNERS |
| Material Document and Classification | DD-G-451,TYPE 1 FED SPEC SINGLE MATERIAL RESPONSE |
| Edge Type | BEVELED |
| Ply Quantity | 1 |
| Environmental Protection | WEATHER RESISTANT |
| 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 |
|---|---|
| 979-1C326 | 5/9 Secondary reference Advanced Logic Resources Inc Dba Alr |
| R10083 | 5/9 Secondary reference Seeburg Corp the Seeburg Products Div |
| 6605-346-4407 | C/1 Advisory reference — outside the item-of-supply concept Naval Inventory Control Point Mechanicsburg |
| 206-503 | 3/2 Design control — primary reference U.S. Government activity |
| 61662 | 5/9 Secondary reference Arma Div Ambac Industries Inc |
| C21066 | 5/9 Secondary reference U.S. Government activity |
| 979-1C326 | 5/9 Secondary reference Gap Instrument Corp |
NSN 9340-00-346-4407 is a Window,observation, classified under FSC 9340, Glass Fabricated Materials. Status: active.
5 possible matches (shared part number, not a government interchangeability claim): 3040-00-895-8662, 4320-01-378-5539, 5331-01-624-7305. Verify interchangeability with system specifications before substitution.
Key specifications for 9340-00-346-4407: Surface Finish: POLISHED; Overall Thickness: 0.250 INCHES NOMINAL IN; Material Transparency: CLEAR; Style Designator: SQUARE CORNERS. 9 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.