The Window,observation, cataloged under National Stock Number 9340-01-187-4012, 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6 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 9340-01-187-4012 |
| Item Name | Window,observation |
| FSC / FSG | 9340 / 93 — Glass Fabricated Materials |
| Status | ACTIVE |
| Overall Thickness | 0.060 INCHES NOMINAL IN |
| Material Transparency | CLEAR |
| Style Designator | SQUARE CORNERS |
| Edge Type | FLAT UNFINISHED |
| Special Markings | DOT 0.05 DIA NEAR SIDE |
| 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 |
|---|---|
| 837735-3 | 5/9 Secondary reference U.S. Government activity |
| 837735-3 | 3/1 Design control — primary reference U.S. Government activity |
| 837735 | 3/1 Design control — primary reference U.S. Government activity |
| 845578-3 | D/9 Drawing number reference only U.S. Government activity |
NSN 9340-01-187-4012 is a Window,observation, classified under FSC 9340, Glass Fabricated Materials. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 9340-01-187-4013. Verify interchangeability with system specifications before substitution.
Key specifications for 9340-01-187-4012: Overall Thickness: 0.060 INCHES NOMINAL IN; Material Transparency: CLEAR; Style Designator: SQUARE CORNERS; Overall Length: 2.000 INCHES NOMINAL IN. 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.