The Switch,flow, cataloged under National Stock Number 5930-01-128-3874, is classified within Federal Supply Class 5930 (Switches) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Setra Systems, Inc. Dba Gems Sensors. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5930-01-128-3874 |
| Primary Part Number | FS-600 39973 |
| Item Name | Switch,flow |
| FSC / FSG | 5930 / 59 — Switches |
| Manufacturer | Setra Systems, Inc. Dba Gems Sensors |
| Status | ACTIVE |
| Frequency in Hertz | 60.0 SINGLE VOLTAGE |
| Contact Action Stimulus | DECREASE |
| Terminal Type | WIRE LEAD |
| Contact Load Current Rating | 500.0 MILLIAMPERES RESISTIVE LOAD SINGLE VOLTAGE |
| Nonpile-Up Contact Arrangement | 1 POLE, SINGLE THROW, NORMALLY OPEN, MOMENTARY ACTION |
| Media for Which Designed | LIQUID |
| Contact Voltage Rating in Volts | 250.0 AC AT SEA LEVEL SINGLE VOLTAGE |
| 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 |
|---|---|
| 39973 | Setra Systems, Inc. Dba Gems Sensors (USA) |
| FS-600 39973 PRIMARY | Setra Systems, Inc. Dba Gems Sensors (USA) |
| Reference | Meaning |
|---|---|
| 023-9973 | 5/9 Secondary reference Gems Sensors Gmbh |
| FS-600 023-9973 | 5/9 Secondary reference Gems Sensors Gmbh |
NSN 5930-01-128-3874 is a Switch,flow, manufactured by Setra Systems, Inc. Dba Gems Sensors, classified under FSC 5930, Switches. Status: active.
NSN 5930-01-128-3874 has 2 manufacturer part numbers on file: 39973 (Setra Systems, Inc. Dba Gems Sensors), FS-600 39973 (Setra Systems, Inc. Dba Gems Sensors).
1 possible match (shared part number, not a government interchangeability claim): 2995-01-168-4363. Verify interchangeability with system specifications before substitution.
Key specifications for FS-600 39973: Frequency in Hertz: 60.0 SINGLE VOLTAGE; Contact Action Stimulus: DECREASE; Terminal Type: WIRE LEAD; Contact Load Current Rating: 500.0 MILLIAMPERES RESISTIVE LOAD SINGLE VOLTAGE. 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.
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.