The Support End Modulator, cataloged under National Stock Number 5820-01-090-8804, is classified within Federal Supply Class 5820 (Radio and Television Communication Equipment, Except Airborne) of the Communication, Detection, and Coherent Radiation Equipment group. The manufacturer of record is Leonardo S.p.a. Div Electronics. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5820-01-090-8804 |
| Primary Part Number | 311505-1 |
| Item Name | Support End Modulator |
| FSC / FSG | 5820 / 58 — Radio and Television Communication Equipment, Except Airborne |
| Manufacturer | Leonardo S.p.a. Div Electronics |
| Status | ACTIVE |
| General Characteristics Item Description | OVERALL LENGTH 4.120 IN.; OVERALL WIDTH 2.980 IN.; OVERALL HEIGHT 0.560 IN. IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 311505-1 | Leonardo S.p.a. Div Electronics (ITA) |
| Reference | Meaning |
|---|---|
| 311505-1 | 5/9 Secondary reference Fiar Fabbrica Italiana Apparecchiature Radioelettriche Spa |
| 311505-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5820-01-090-8804 is a Support End Modulator, manufactured by Leonardo S.p.a. Div Electronics, classified under FSC 5820, Radio and Television Communication Equipment, Except Airborne. Status: active.
NSN 5820-01-090-8804 has 1 manufacturer part number on file: 311505-1 (Leonardo S.p.a. Div Electronics).
Key specifications for 311505-1: General Characteristics Item Description: OVERALL LENGTH 4.120 IN.; OVERALL WIDTH 2.980 IN.; OVERALL HEIGHT 0.560 IN. IN. 1 specification is 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.
NSN 5820-01-090-8804 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.