The Switch,thermostatic, cataloged under National Stock Number 5930-00-359-4089, is classified within Federal Supply Class 5930 (Switches) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Avionics Specialties, Inc.. Government technical data includes 21 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5930-00-359-4089 |
| Primary Part Number | 123-502 |
| Item Name | Switch,thermostatic |
| FSC / FSG | 5930 / 59 — Switches |
| Manufacturer | Avionics Specialties, Inc. |
| Status | ACTIVE |
| Contact Action Stimulus | INCREASE |
| Terminal Type | TAB, SOLDER LUG |
| Overall Diameter | 0.605 INCHES MAXIMUM IN |
| Contact Load Current Rating | 2.0 AMPERES RESISTIVE LOAD FIRST VOLTAGE |
| Contact Load Current Rating | 5.0 AMPERES RESISTIVE LOAD SECOND VOLTAGE |
| Mounting Method | THREADED STUD(S) |
| Thread Length | 0.171 INCHES MINIMUM AND 0.203 INCHES MAXIMUM ALL THREADED STUD IN |
| Body Height | 0.321 INCHES MAXIMUM IN |
| Style Designator | DISC |
| Temp Sensing Element Type | INTERNAL SENSOR |
| Features Provided | HERMETICALLY SEALED CASE |
| Nominal Thread Size | 0.138 INCHES ALL THREADED STUD IN |
| Nonpile-Up Contact Arrangement | 1 POLE, SINGLE THROW, NORMALLY CLOSED, MOMENTARY ACTION |
| Media for Which Designed | GAS |
| Thread Class | 2A ALL THREADED STUD A |
| Contact Stimulus Rating | 125.00 ACTUATION POINT NOMINAL DEGREES FAHRENHEIT AND 95.00 DEACTUATION POINT NOMINAL DEGREES FAHRENHEIT |
| Thread Quantity Per Inch | 32 ALL THREADED STUD |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) ALL THREADED STUD |
| Contact Adjustability | DEACTUATION POINT NOT ADJUSTABLE AND ACTUATION POINT NOT ADJUSTABLE |
| Contact Voltage Rating in Volts | 28.0 DC AT SEA LEVEL SECOND VOLTAGE |
| Contact Voltage Rating in Volts | 115.0 AC AT SEA LEVEL FIRST 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 |
|---|---|
| 3100-43-655 | Honeywell International Inc. Dba Honeywell Div Sensing and Control (USA) |
| 3100-43-194 | Honeywell International Inc. Dba Honeywell Div Sensing and Control (USA) |
| 123-502 PRIMARY | Avionics Specialties, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 123C502 | 5/9 Secondary reference Avionics Specialties, Inc. |
NSN 5930-00-359-4089 is a Switch,thermostatic, manufactured by Avionics Specialties, Inc., classified under FSC 5930, Switches. Status: active.
NSN 5930-00-359-4089 has 3 manufacturer part numbers on file: 3100-43-655 (Honeywell International Inc. Dba Honeywell Div Sensing and Control), 3100-43-194 (Honeywell International Inc. Dba Honeywell Div Sensing and Control), 123-502 (Avionics Specialties, Inc.).
2 possible matches (shared part number, not a government interchangeability claim): 6630-01-053-2544, 6530-01-724-6227. Verify interchangeability with system specifications before substitution.
Key specifications for 123-502: Overall Height: 0.756 INCHES MINIMUM AND 0.788 INCHES MAXIMUM IN; Contact Action Stimulus: INCREASE; Terminal Type: TAB, SOLDER LUG; Overall Diameter: 0.605 INCHES MAXIMUM IN. 21 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.