The Coupler,rotary,radio Frequency, cataloged under National Stock Number 5985-01-649-4498, 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 U S Dept of Transportation Federal Aviation Administration. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-01-649-4498 |
| Primary Part Number | 1639RPD |
| Item Name | Coupler,rotary,radio Frequency |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | U S Dept of Transportation Federal Aviation Administration |
| Status | ACTIVE |
| 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 |
|---|---|
| 1639RPD PRIMARY | U S Dept of Transportation Federal Aviation Administration (USA) |
NSN 5985-01-649-4498 is a Coupler,rotary,radio Frequency, manufactured by U S Dept of Transportation Federal Aviation Administration, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-649-4498 has 1 manufacturer part number on file: 1639RPD (U S Dept of Transportation Federal Aviation Administration).
Key specifications for 1639RPD: Special Features: ASR-11 ROTARY COUPLER UNIT THAT ALLOWS RF SIGNALS, ELECRICALLY SIGNALS TO PASS FROM A STATIC POINT TO A DYNAMIC ROTATIONAL POINT THRU A MEDIUM.; Part Name Assigned by Controlling Agency: ROTARY COUPLER, 6 C; End Item Identification: DIGITAL TERMINAL RADAR AIRPORT SURVEILLANCE RADAR (ASR11). 0 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 5985-01-649-4498 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.