The Upper Azimuth Subassembly No. 1, cataloged under National Stock Number 5840-01-098-4601, is classified within Federal Supply Class 5840 (Radar Equipment, Except Airborne) of the Communication, Detection, and Coherent Radiation Equipment group. The manufacturer of record is Elettronica Aster Spa. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5840-01-098-4601 |
| Primary Part Number | 855304-1 |
| Item Name | Upper Azimuth Subassembly No. 1 |
| FSC / FSG | 5840 / 58 — Radar Equipment, Except Airborne |
| Manufacturer | Elettronica Aster Spa |
| Status | ACTIVE |
| General Characteristics Item Description | 4 WAVEGUIDES; TUNING STUB; 1 FLANGE CHOKE; 1 WAVEGUIDE ADAPTER; NICKEL PLATED |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 855304-1 | Elettronica Aster Spa (ITA) |
| Reference | Meaning |
|---|---|
| 855304-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5840-01-098-4601 is a Upper Azimuth Subassembly No. 1, manufactured by Elettronica Aster Spa, classified under FSC 5840, Radar Equipment, Except Airborne. Status: active.
NSN 5840-01-098-4601 has 1 manufacturer part number on file: 855304-1 (Elettronica Aster Spa).
1 possible match (shared part number, not a government interchangeability claim): 5995-01-694-7778. Verify interchangeability with system specifications before substitution.
Key specifications for 855304-1: General Characteristics Item Description: 4 WAVEGUIDES; TUNING STUB; 1 FLANGE CHOKE; 1 WAVEGUIDE ADAPTER; NICKEL PLATED. 1 specification is 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.
NSN 5840-01-098-4601 has DEMIL Code D. 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.