The Switch,thermostatic, cataloged under National Stock Number 5930-01-351-5659, is classified within Federal Supply Class 5930 (Switches) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Lake Shore Systems, Inc.. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5930-01-351-5659 |
| Primary Part Number | 2C3-1866 PIECE 15 |
| Item Name | Switch,thermostatic |
| FSC / FSG | 5930 / 59 — Switches |
| Manufacturer | Lake Shore Systems, Inc. |
| Status | ACTIVE |
| Contact Action Stimulus | INCREASE |
| Terminal Type | SCREW |
| Precious Material | SILVER |
| Contact Load Current Rating | 10.0 AMPERES RESISTIVE LOAD SECOND VOLTAGE |
| Contact Load Current Rating | 10.0 AMPERES RESISTIVE LOAD FIRST VOLTAGE |
| Contact Load Current Rating | 3.0 AMPERES RESISTIVE LOAD THIRD VOLTAGE |
| Mounting Method | THREADED BUSHING |
| Contact Adjustment Range | +75.00 TO 200.00 ACTUATION POINT DEGREES FAHRENHEIT |
| Thread Length | 0.875 INCHES NOMINAL SINGLE THREADED BUSHING IN |
| Body Height | 4.541 INCHES NOMINAL IN |
| Style Designator | RECTANGULAR |
| Temp Sensing Element Type | IMMERSION WELL |
| Contact Adjustment Type | EXTERNAL ACTUATION POINT SCREW |
| Nominal Thread Size | 0.750 INCHES SINGLE THREADED BUSHING IN |
| Nonpile-Up Contact Arrangement | 1 POLE, DOUBLE THROW, ONE POSITION MOMENTARY |
| Precious Material and Location | CONTACTS SILVER |
| Media for Which Designed | LIQUID |
| Thread Series Designator | NPT SINGLE THREADED BUSHING |
| Contact Adjustability | ACTUATION POINT ADJUSTABLE |
| Contact Voltage Rating in Volts | 480.0 AC AT SEA LEVEL THIRD VOLTAGE |
| Contact Voltage Rating in Volts | 250.0 AC AT SEA LEVEL SECOND VOLTAGE |
| Contact Voltage Rating in Volts | 125.0 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 |
|---|---|
| 2C3-1866 PIECE 15 PRIMARY | Lake Shore Systems, Inc. (USA) |
| Reference | Meaning |
|---|---|
| ML1H-S203-WS | 5/2 Secondary reference U.S. Government activity |
| MLIH-S203-WS | C/1 Advisory reference — outside the item-of-supply concept Transamerica Delaval Inc Barksdale Controls Div |
| ML1H-S203-WS | 5/9 Secondary reference Transamerica Delaval Inc Barksdale Controls Div |
NSN 5930-01-351-5659 is a Switch,thermostatic, manufactured by Lake Shore Systems, Inc., classified under FSC 5930, Switches. Status: active.
NSN 5930-01-351-5659 has 1 manufacturer part number on file: 2C3-1866 PIECE 15 (Lake Shore Systems, Inc.).
Key specifications for 2C3-1866 PIECE 15: Overall Height: 8.250 INCHES NOMINAL IN; Contact Action Stimulus: INCREASE; Terminal Type: SCREW; Precious Material: SILVER. 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.