The Coupler,rotary,radio Frequency, cataloged under National Stock Number 5985-01-051-4018, 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 Frontgrade Technologies Inc.. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5985-01-051-4018 |
| Primary Part Number | 1106D |
| Item Name | Coupler,rotary,radio Frequency |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Frontgrade Technologies Inc. |
| Status | ACTIVE |
| Overall Diameter | 1.620 INCHES NOMINAL IN |
| Input Impedance Rating in Ohms | 50.0 |
| Radio Frequency Rating | 0.0 HERTZ NOMINAL AND 12.4 GIGAHERTZ MAXIMUM |
| Unit Type | COAXIAL LINE |
| Mounting Configuration | FOUR 0.160 IN. DIA MTG HOLES EQUALLY SPACED ON 1.250 IN. DIA BC IN |
| Material | COPPER ALLOY |
| Output Impedance Rating in Ohms | 50.0 |
| 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 |
|---|---|
| 1106D | Frontgrade Technologies Inc. (USA) |
| 39-2120 | Diamond Antenna & Microwave Corporation (USA) |
| Reference | Meaning |
|---|---|
| 344AH | 5/9 Secondary reference Spectrum Microwave, Inc. |
| 1106D | 5/9 Secondary reference Kevlin Corporation Dba Cobham Sensor Systems Div Kevlin Division |
| 126-2493-010 | 3/9 Design control — primary reference Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems |
NSN 5985-01-051-4018 is a Coupler,rotary,radio Frequency, manufactured by Frontgrade Technologies Inc., classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-051-4018 has 2 manufacturer part numbers on file: 1106D (Frontgrade Technologies Inc.), 39-2120 (Diamond Antenna & Microwave Corporation).
1 possible match (shared part number, not a government interchangeability claim): 5330-01-316-7634. Verify interchangeability with system specifications before substitution.
Key specifications for 1106D: Overall Diameter: 1.620 INCHES NOMINAL IN; Input Impedance Rating in Ohms: 50.0; Radio Frequency Rating: 0.0 HERTZ NOMINAL AND 12.4 GIGAHERTZ MAXIMUM; Overall Length: 2.700 INCHES NOMINAL IN. 7 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 5985-01-051-4018 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.