The Coupler,rotary,radio Frequency, cataloged under National Stock Number 5985-01-165-2090, 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 Diamond Antenna & Microwave Corporation. Government technical data includes 4 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-01-165-2090 |
| Primary Part Number | 2124 |
| Item Name | Coupler,rotary,radio Frequency |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Diamond Antenna & Microwave Corporation |
| Status | ACTIVE |
| Overall Diameter | 0.500 INCHES NOMINAL IN |
| Input Impedance Rating in Ohms | 50.0 |
| Radio Frequency Rating | 18.0 GIGAHERTZ NOMINAL |
| Unit Type | COAXIAL LINE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 2124 PRIMARY | Diamond Antenna & Microwave Corporation (USA) |
| Reference | Meaning |
|---|---|
| 58139-91020 | 1/2 Source control — Government-approved source U.S. Government activity |
| RC16209 | C/1 Advisory reference — outside the item-of-supply concept Frontgrade Technologies Inc. |
| RC16209 | 5/9 Secondary reference Kevlin Corporation Dba Cobham Sensor Systems Div Kevlin Division |
NSN 5985-01-165-2090 is a Coupler,rotary,radio Frequency, manufactured by Diamond Antenna & Microwave Corporation, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-165-2090 has 1 manufacturer part number on file: 2124 (Diamond Antenna & Microwave Corporation).
Key specifications for 2124: Overall Diameter: 0.500 INCHES NOMINAL IN; Input Impedance Rating in Ohms: 50.0; Radio Frequency Rating: 18.0 GIGAHERTZ NOMINAL; Overall Length: 1.620 INCHES NOMINAL IN. 4 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 5985-01-165-2090 has DEMIL Code Q. 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.