The Switch,pressure, cataloged under National Stock Number 5930-01-491-9537, is classified within Federal Supply Class 5930 (Switches) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Sigma-Netics, Inc.. Government technical data includes 20 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5930-01-491-9537 |
| Primary Part Number | 744630 |
| Item Name | Switch,pressure |
| FSC / FSG | 5930 / 59 — Switches |
| Manufacturer | Sigma-Netics, Inc. |
| Status | ACTIVE |
| Width Across Flats | 0.938 INCHES NOMINAL IN |
| Contact Action Stimulus | INCREASE |
| Terminal Type | CONNECTOR, RECEPTACLE |
| Overall Diameter | 0.750 INCHES NOMINAL IN |
| Contact Load Current Rating | 0.5 AMPERES LAMP LOAD AND 1.0 AMPERES RESISTIVE LOAD SINGLE VOLTAGE |
| Mounting Method | THREADED BUSHING |
| Style Designator | CYLINDRICAL |
| Outside Diameter | 0.750 INCHES NOMINAL SINGLE CONNECTION IN |
| Pressure Switch Type | GAGE |
| Nominal Thread Size | 0.438 INCHES SINGLE THREADED BUSHING IN |
| Body Length | 2.860 INCHES NOMINAL IN |
| Pressure Connector Type | GASKET SEAL, THREADED EXTERNAL SINGLE CONNECTION |
| Operating Temp Rating | -25.0 FAHRENHEIT MINIMUM AND 120.0 FAHRENHEIT MAXIMUM DEGF |
| Nonpile-Up Contact Arrangement | 1 POLE, DOUBLE THROW, BOTH POSITIONS MAINTAINED |
| Media for Which Designed | LIQUID |
| Thread Class | 2A SINGLE THREADED BUSHING A |
| Contact Stimulus Rating | 160.00 ACTUATION POINT NOMINAL POUNDS PER SQUARE INCH GAGE |
| Thread Series Designator | UNF SINGLE THREADED BUSHING |
| Contact Adjustability | ACTUATION POINT NOT ADJUSTABLE |
| Contact Voltage Rating in Volts | 28.0 DC 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 |
|---|---|
| 12365117-2 | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| 744630 PRIMARY | Sigma-Netics, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 12365117 | D/9 Drawing number reference only U S Army Tank Automotive Command Amsta-Im-Mm |
NSN 5930-01-491-9537 is a Switch,pressure, manufactured by Sigma-Netics, Inc., classified under FSC 5930, Switches. Status: active.
NSN 5930-01-491-9537 has 2 manufacturer part numbers on file: 12365117-2 (U S Army Tank Automotive Command Amsta-Im-Mm), 744630 (Sigma-Netics, Inc.).
2 possible matches (shared part number, not a government interchangeability claim): 5930-01-492-4907, 5930-01-493-4231. Verify interchangeability with system specifications before substitution.
Key specifications for 744630: Width Across Flats: 0.938 INCHES NOMINAL IN; Contact Action Stimulus: INCREASE; Terminal Type: CONNECTOR, RECEPTACLE; Overall Diameter: 0.750 INCHES NOMINAL IN. 20 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.