The Frame,observation Window, cataloged under National Stock Number 5520-01-680-2114, is classified within Federal Supply Class 5520 (Millwork) of the Lumber, Millwork, Plywood, and Veneer group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 2 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5520-01-680-2114 |
| Primary Part Number | 803-6397269 REV B PC NO. 215 |
| Item Name | Frame,observation Window |
| FSC / FSG | 5520 / 55 — Millwork |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Overall Diameter | 9.375 INCHES NOMINAL IN |
| Material | STEEL CORROSION RESISTING |
| 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 |
|---|---|
| 803-6397269 REV B PC NO. 215 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 803-6397269 REV B | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 5520-01-680-2114 is a Frame,observation Window, manufactured by Naval Sea Systems Command, classified under FSC 5520, Millwork. Status: active.
NSN 5520-01-680-2114 has 1 manufacturer part number on file: 803-6397269 REV B PC NO. 215 (Naval Sea Systems Command).
Key specifications for 803-6397269 REV B PC NO. 215: Overall Height: 0.531 INCHES NOMINAL IN; Overall Diameter: 9.375 INCHES NOMINAL IN; Special Features: ID IS 6.000 INCHES (NOM);SIX 0.406 INCHES (NOM) UNTHREADED BOLT HOLES ON A 8.375 INCH (NOM) BOLT CIRCLE;MATERIAL DOCUMENT CLASSIFICATION CODE IS ASTM A240, TYPE 316, COND A IN; End Item Identification: DOOR, LH 26" X 7'. 2 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.