The Window,observation, cataloged under National Stock Number 9340-00-497-9447, is classified within Federal Supply Class 9340 (Glass Fabricated Materials) of the Nonmetallic Fabricated Materials group. The manufacturer of record is Federal Industries, Inc. Dba United Valve Company. Government technical data includes 8 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 9340-00-497-9447 |
| Primary Part Number | SGT528-1 |
| Item Name | Window,observation |
| FSC / FSG | 9340 / 93 — Glass Fabricated Materials |
| Manufacturer | Federal Industries, Inc. Dba United Valve Company |
| Status | ACTIVE |
| Overall Diameter | 1.862 INCHES MINIMUM AND 1.865 INCHES MAXIMUM IN |
| Surface Finish | POLISHED |
| Material Transparency | CLEAR |
| Material Document and Classification | SGTB28-1 MFR REF SINGLE MATERIAL RESPONSE |
| Edge Type | BEVELED |
| Ply Quantity | 1 |
| Environmental Protection | CHEMICAL RESISTANT |
| 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 |
|---|---|
| SGT528-1 PRIMARY | Federal Industries, Inc. Dba United Valve Company (USA) |
| Reference | Meaning |
|---|---|
| SGT528-1 | 5/9 Secondary reference U.S. Government activity |
NSN 9340-00-497-9447 is a Window,observation, manufactured by Federal Industries, Inc. Dba United Valve Company, classified under FSC 9340, Glass Fabricated Materials. Status: active.
NSN 9340-00-497-9447 has 1 manufacturer part number on file: SGT528-1 (Federal Industries, Inc. Dba United Valve Company).
Key specifications for SGT528-1: Overall Diameter: 1.862 INCHES MINIMUM AND 1.865 INCHES MAXIMUM IN; Surface Finish: POLISHED; Material Transparency: CLEAR; Material Document and Classification: SGTB28-1 MFR REF SINGLE MATERIAL RESPONSE. 8 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.