The Switch,flow, cataloged under National Stock Number 5930-01-259-1997, 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 15 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 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 | 5930-01-259-1997 |
| Primary Part Number | 26538 |
| Item Name | Switch,flow |
| FSC / FSG | 5930 / 59 — Switches |
| Manufacturer | Setra Systems, Inc. Dba Gems Sensors |
| Status | ACTIVE |
| Contact Action Stimulus | DECREASE |
| Terminal Type | WIRE LEAD |
| Contact Load Current Rating | 500.0 MILLIAMPERES RESISTIVE LOAD AND 500.0 MILLIAMPERES INDUCTIVE LOAD SECOND VOLTAGE |
| Contact Load Current Rating | 500.0 MILLIAMPERES RESISTIVE LOAD AND 500.0 MILLIAMPERES INDUCTIVE LOAD FIRST VOLTAGE |
| Mounting Method | INLET CONNECTION AND OUTLET CONNECTION |
| Features Provided | HERMETICALLY SEALED CASE |
| Nominal Thread Size | 1.250 INCHES ALL THREADED HOLE IN |
| Nonpile-Up Contact Arrangement | 1 POLE, SINGLE THROW, NORMALLY CLOSED, MOMENTARY ACTION |
| Media for Which Designed | GAS OR LIQUID |
| Contact Stimulus Rating | 18.00 ACTUATION POINT NOMINAL GALLONS PER MINUTE |
| Thread Series Designator | NPT ALL THREADED HOLE |
| Contact Adjustability | ACTUATION POINT NOT ADJUSTABLE |
| Contact Voltage Rating in Volts | 6.0 DC AT SEA LEVEL FIRST VOLTAGE |
| Contact Voltage Rating in Volts | 32.0 DC AT SEA LEVEL SECOND VOLTAGE |
| Hazardous Locations/environmental Protection | VIBRATION RESISTANT |
| 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 |
|---|---|
| 26538 PRIMARY | Setra Systems, Inc. Dba Gems Sensors (USA) |
NSN 5930-01-259-1997 is a Switch,flow, manufactured by Setra Systems, Inc. Dba Gems Sensors, classified under FSC 5930, Switches. Status: active.
NSN 5930-01-259-1997 has 1 manufacturer part number on file: 26538 (Setra Systems, Inc. Dba Gems Sensors).
1 possible match (shared part number, not a government interchangeability claim): 4720-01-301-8122. Verify interchangeability with system specifications before substitution.
Key specifications for 26538: Overall Height: 4.750 INCHES NOMINAL IN; Contact Action Stimulus: DECREASE; Terminal Type: WIRE LEAD; Contact Load Current Rating: 500.0 MILLIAMPERES RESISTIVE LOAD AND 500.0 MILLIAMPERES INDUCTIVE LOAD SECOND VOLTAGE. 15 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.