The Tuning Unit,radio Frequency, cataloged under National Stock Number 5820-01-690-4558, 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 Argon St, Inc.. The record lists 3 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Tuning Unit,radio Frequency |
| FSC / FSG | 5820 — Radio and Television Communication Equipment, Except Airborne (FSG 58) |
| Manufacturers | Argon St, Inc. (CAGE 3B3G2); Caci Azure Summit Technology, Llc (CAGE 4WAE2); Argon St, Inc. (CAGE 09XP2) |
| Parameter | Value |
|---|---|
| NSN | 5820-01-690-4558 |
| Primary Part Number | 279823-20 |
| Item Name | Tuning Unit,radio Frequency |
| FSC / FSG | 5820 / 58 — Radio and Television Communication Equipment, Except Airborne |
| Manufacturer | Argon St, Inc. |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 279823-20 PRIMARY | Argon St, Inc. (USA) |
| 279823-20 | Caci Azure Summit Technology, Llc (USA) |
| 279823-20 PRIMARY | Argon St, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 279823 | D/9 Drawing number reference only Argon St, Inc. |
| 279823 SHEET 13 | C/1 Advisory reference — outside the item-of-supply concept Argon St, Inc. |
NSN 5820-01-690-4558 is a Tuning Unit,radio Frequency, manufactured by Argon St, Inc., classified under FSC 5820, Radio and Television Communication Equipment, Except Airborne. Status: active.
NSN 5820-01-690-4558 has 3 manufacturer part numbers on file: 279823-20 (Argon St, Inc.), 279823-20 (Caci Azure Summit Technology, Llc), 279823-20 (Argon St, Inc.).
2 possible matches (shared part number, not a government interchangeability claim): 5895-01-698-2274, 7025-01-700-1893. Verify interchangeability with system specifications before substitution.
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 5820-01-690-4558 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.