The Coupler,rotary,radio Frequency, cataloged under National Stock Number 5985-00-811-9381, 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 Spectrum Microwave, Inc.. Government technical data includes 6 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-00-811-9381 |
| Primary Part Number | 305 |
| Item Name | Coupler,rotary,radio Frequency |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Spectrum Microwave, Inc. |
| Status | ACTIVE |
| Overall Diameter | 1.250 INCHES NOMINAL IN |
| Input Impedance Rating in Ohms | 50.0 |
| Unit Type | COAXIAL LINE |
| Mounting Configuration | TYPE N MALE,5/8-24 NEF-28 THD CONNECTOR ONE END |
| Material | COPPER ALLOY |
| Output Impedance Rating in Ohms | 50.0 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 305 PRIMARY | Spectrum Microwave, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 2351806 | 5/9 Secondary reference Lockheed Martin Corporation Div Rms - Mitchel Field |
NSN 5985-00-811-9381 is a Coupler,rotary,radio Frequency, manufactured by Spectrum Microwave, Inc., classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-00-811-9381 has 1 manufacturer part number on file: 305 (Spectrum Microwave, Inc.).
Key specifications for 305: Overall Diameter: 1.250 INCHES NOMINAL IN; Input Impedance Rating in Ohms: 50.0; Overall Length: 3.375 INCHES NOMINAL IN; Unit Type: COAXIAL LINE. 6 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.
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.