The Switch,radio Frequency Transmiss, cataloged under National Stock Number 5985-01-370-1328, 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 Lockheed Martin Corporation Div Rms. Government technical data includes 16 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-01-370-1328 |
| Primary Part Number | 1209253-201 |
| Item Name | Switch,radio Frequency Transmiss |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Lockheed Martin Corporation Div Rms |
| Status | ACTIVE |
| Switching Time | 200.0 NANOSECONDS NS |
| Mounting Facility Type and Quantity | 2 UNTHREADED HOLE(S) |
| Voltage Standing Wave Ratio | 1.50 SINGLE |
| Unthreaded Mounting Hole Diameter | 0.120 INCHES NOMINAL IN |
| Switch Return Mechanism Type | FAIL-SAFE |
| Connector End Design | FEMALE |
| Distance Between Mounting Facility Centers | 0.800 INCHES NOMINAL SINGLE MOUNTING FACILITY PATTERN IN |
| Coupling Position Quantity | 2 |
| Minimum Crosstalk Rating in Decibels | 60.0 SINGLE |
| Switch Type | TRANSFER |
| Insertion Loss in Decibels | 0.70 SINGLE |
| Actuator Operating Method | RELAY |
| Frequency Rating | 0.5 GIGAHERTZ MINIMUM AND 2.0 GIGAHERTZ MAXIMUM SINGLE FREQUENCY OPERATING |
| Rf Power Handling Capability | 0.5 WATTS AVERAGE SINGLE |
| Terminal Type and Quantity | 2 PLUG, COAXIAL AND 4 PIN |
| Coaxial Connector Series Designation | SMA |
| 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 |
|---|---|
| 1209253-201 PRIMARY | Lockheed Martin Corporation Div Rms (USA) |
| Reference | Meaning |
|---|---|
| 1209253-201 | 5/9 Secondary reference Lockheed Martin Corporation Div Rms - Mitchel Field |
| MA2660-9018 | 5/9 Secondary reference U.S. Government activity |
NSN 5985-01-370-1328 is a Switch,radio Frequency Transmiss, manufactured by Lockheed Martin Corporation Div Rms, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-370-1328 has 1 manufacturer part number on file: 1209253-201 (Lockheed Martin Corporation Div Rms).
Key specifications for 1209253-201: Switching Time: 200.0 NANOSECONDS NS; Mounting Facility Type and Quantity: 2 UNTHREADED HOLE(S); Overall Height: 1.200 INCHES NOMINAL IN; Voltage Standing Wave Ratio: 1.50 SINGLE. 16 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.