The Window,observation, cataloged under National Stock Number 9330-01-004-4560, is classified within Federal Supply Class 9330 (Plastics Fabricated Materials) of the Nonmetallic Fabricated Materials group. The manufacturer of record is Northrop Grumman Support Services Corp. Government technical data includes 7 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 9330-01-004-4560 |
| Primary Part Number | 137C260H01 |
| Item Name | Window,observation |
| FSC / FSG | 9330 / 93 — Plastics Fabricated Materials |
| Manufacturer | Northrop Grumman Support Services Corp |
| Status | ACTIVE |
| Overall Diameter | 16.295 INCHES MINIMUM AND 16.315 INCHES MAXIMUM IN |
| Overall Thickness | 0.250 INCHES NOMINAL IN |
| Material Transparency | CLEAR |
| Style Designator | HALF ROUND |
| Edge Type | BEVELED |
| Ply Quantity | 1 |
| Material | PLASTIC |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 137C260H01 PRIMARY | Northrop Grumman Support Services Corp (USA) |
| 137C260H01 | Indiana Glass Co (USA) |
| Reference | Meaning |
|---|---|
| 137C260H01 | 5/9 Secondary reference Spencer Industries Inc |
| 137C260H01 | 3/9 Design control — primary reference U.S. Government activity |
NSN 9330-01-004-4560 is a Window,observation, manufactured by Northrop Grumman Support Services Corp, classified under FSC 9330, Plastics Fabricated Materials. Status: active.
NSN 9330-01-004-4560 has 2 manufacturer part numbers on file: 137C260H01 (Northrop Grumman Support Services Corp), 137C260H01 (Indiana Glass Co).
Key specifications for 137C260H01: Overall Diameter: 16.295 INCHES MINIMUM AND 16.315 INCHES MAXIMUM IN; Overall Thickness: 0.250 INCHES NOMINAL IN; Material Transparency: CLEAR; Style Designator: HALF ROUND. 7 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). 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.