The Window,observation, cataloged under National Stock Number 9340-01-171-7640, is classified within Federal Supply Class 9340 (Glass Fabricated Materials) of the Nonmetallic Fabricated Materials group. The manufacturer of record is Technical Wire Products, Llc Dba Twp. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 9340-01-171-7640 |
| Primary Part Number | 71-90308 |
| Item Name | Window,observation |
| FSC / FSG | 9340 / 93 — Glass Fabricated Materials |
| Manufacturer | Technical Wire Products, Llc Dba Twp |
| Status | ACTIVE |
| Fourth Corner Radius | 0.090 INCHES NOMINAL IN |
| First Corner Radius | 0.090 INCHES NOMINAL IN |
| Second Corner Radius | 0.090 INCHES NOMINAL IN |
| Overall Thickness | 0.160 INCHES NOMINAL IN |
| Material Transparency | CLEAR |
| Style Designator | ROUNDED CORNERS |
| Features Provided | FRAME |
| Ply Quantity | 1 |
| Material | PLASTIC ACRYLIC |
| Third Corner Radius | 0.090 INCHES NOMINAL IN |
| 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 |
|---|---|
| 66010004-000 | Metal Textiles Corporation Dba Metal Textiles Div Electronic Shielding Group (USA) |
| 71-90308 PRIMARY | Technical Wire Products, Llc Dba Twp (USA) |
| Reference | Meaning |
|---|---|
| 66010004-000 | 5/9 Secondary reference U.S. Government activity |
| 66010004-000 | 5/9 Secondary reference Spectrum Control Inc |
NSN 9340-01-171-7640 is a Window,observation, manufactured by Technical Wire Products, Llc Dba Twp, classified under FSC 9340, Glass Fabricated Materials. Status: active.
NSN 9340-01-171-7640 has 2 manufacturer part numbers on file: 66010004-000 (Metal Textiles Corporation Dba Metal Textiles Div Electronic Shielding Group), 71-90308 (Technical Wire Products, Llc Dba Twp).
Key specifications for 71-90308: Fourth Corner Radius: 0.090 INCHES NOMINAL IN; First Corner Radius: 0.090 INCHES NOMINAL IN; Second Corner Radius: 0.090 INCHES NOMINAL IN; Overall Thickness: 0.160 INCHES NOMINAL IN. 10 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.