The Switch,thermostatic, cataloged under National Stock Number 5930-00-583-2522, is classified within Federal Supply Class 5930 (Switches) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Westinghouse Electric Corp. Government technical data includes 22 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5930-00-583-2522 |
| Primary Part Number | 331C221H01 |
| Item Name | Switch,thermostatic |
| FSC / FSG | 5930 / 59 — Switches |
| Manufacturer | Westinghouse Electric Corp |
| Status | ACTIVE |
| Body Diameter | 0.618 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN |
| Width Across Flats | 1.000 INCHES NOMINAL IN |
| Frequency in Hertz | 60.0 SINGLE VOLTAGE |
| Contact Action Stimulus | INCREASE |
| Terminal Type | WIRE LEAD |
| Contact Load Current Rating | 10.0 AMPERES RESISTIVE LOAD SINGLE VOLTAGE |
| Mounting Method | THREADED BUSHING |
| Contact Adjustment Range | -100.00 TO 400.00 ACTUATION POINT DEGREES FAHRENHEIT AND +100.00 TO 500.00 DEACTUATION POINT DEGREES FAHRENHEIT |
| Thread Length | 0.719 INCHES NOMINAL SINGLE THREADED BUSHING IN |
| Style Designator | CYLINDRICAL |
| Temp Sensing Element Type | INTERNAL SENSOR |
| Contact Adjustment Type | EXTERNAL DEACTUATION POINT SCREW AND EXTERNAL ACTUATION POINT SCREW |
| Nominal Thread Size | 0.500 INCHES SINGLE THREADED BUSHING IN |
| Body Length | 3.688 INCHES NOMINAL IN |
| Nonpile-Up Contact Arrangement | 1 POLE, SINGLE THROW, NORMALLY CLOSED, MOMENTARY ACTION |
| Media for Which Designed | GAS OR LIQUID |
| Thread Class | 3A SINGLE THREADED BUSHING A |
| Contact Stimulus Rating | 185.00 ACTUATION POINT NOMINAL DEGREES FAHRENHEIT AND 184.00 DEACTUATION POINT NOMINAL DEGREES FAHRENHEIT |
| Thread Quantity Per Inch | 14 SINGLE THREADED BUSHING |
| Thread Series Designator | NPT SINGLE THREADED BUSHING |
| Contact Adjustability | DEACTUATION POINT ADJUSTABLE, PRESET AND ACTUATION POINT ADJUSTABLE, PRESET |
| Contact Voltage Rating in Volts | 115.0 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 |
|---|---|
| 331C221H01 | Westinghouse Electric Corp (USA) |
| Reference | Meaning |
|---|---|
| 331C221H01 | 3/2 Design control — primary reference U.S. Government activity |
| 17100-400 | 5/1 Secondary reference Kidde Technologies, Inc Dba Fenwal Safety Systems Div Fenwall Safety Systems |
NSN 5930-00-583-2522 is a Switch,thermostatic, manufactured by Westinghouse Electric Corp, classified under FSC 5930, Switches. Status: active.
NSN 5930-00-583-2522 has 1 manufacturer part number on file: 331C221H01 (Westinghouse Electric Corp).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-691-6887. Verify interchangeability with system specifications before substitution.
Key specifications for 331C221H01: Body Diameter: 0.618 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN; Width Across Flats: 1.000 INCHES NOMINAL IN; Frequency in Hertz: 60.0 SINGLE VOLTAGE; Contact Action Stimulus: INCREASE. 22 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.