The Coupler,rotary,radio Frequency, cataloged under National Stock Number 5985-01-413-4661, is classified within Federal Supply Class 5985 (Antennas, Waveguides, and Related Equipment) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Northrop Grumman Systems Corporation. Government technical data includes 3 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5985-01-413-4661 |
| Primary Part Number | 1978734 |
| Item Name | Coupler,rotary,radio Frequency |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Radio Frequency Rating | 9.2 GIGAHERTZ MINIMUM AND 9.6 GIGAHERTZ MAXIMUM |
| Unit Type | WAVEGUIDE |
| Material | COPPER ALLOY |
| 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 |
|---|---|
| 1978734 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| 27-746-0 PRIMARY | Diamond Antenna & Microwave Corporation (USA) |
| DIC27-746 | Diamond Antenna & Microwave Corporation (USA) |
| Reference | Meaning |
|---|---|
| 11-4110 | 5/9 Secondary reference Eastern Microwave Corp |
NSN 5985-01-413-4661 is a Coupler,rotary,radio Frequency, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-413-4661 has 3 manufacturer part numbers on file: 1978734 (Northrop Grumman Systems Corporation), 27-746-0 (Diamond Antenna & Microwave Corporation), DIC27-746 (Diamond Antenna & Microwave Corporation).
1 possible match (shared part number, not a government interchangeability claim): 6750-01-427-2909. Verify interchangeability with system specifications before substitution.
Key specifications for 1978734: Radio Frequency Rating: 9.2 GIGAHERTZ MINIMUM AND 9.6 GIGAHERTZ MAXIMUM; Unit Type: WAVEGUIDE; End Item Identification: RADAR MAST; Material: COPPER ALLOY. 3 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.
NSN 5985-01-413-4661 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.