The Switch,thermostatic, cataloged under National Stock Number 5930-00-040-1643, is classified within Federal Supply Class 5930 (Switches) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Ranco Inc Ranco Controls Div. Government technical data includes 17 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5930-00-040-1643 |
| Primary Part Number | C12-5240 |
| Item Name | Switch,thermostatic |
| FSC / FSG | 5930 / 59 — Switches |
| Manufacturer | Ranco Inc Ranco Controls Div |
| Status | ACTIVE |
| Contact Action Stimulus | INCREASE |
| Terminal Type | TAB, SOLDER LUG |
| Mounting Facility Pattern | TWO POSITION DIAGONAL |
| Bulb Length | 6.500 INCHES NOMINAL IN |
| Bulb Diameter | 0.375 INCHES NOMINAL IN |
| Mounting Method | BRACKET(S) AND UNTHREADED HOLE(S) |
| Body Width | 1.438 INCHES NOMINAL IN |
| Body Height | 1.625 INCHES NOMINAL IN |
| Unthreaded Mounting Hole Diameter | 0.125 INCHES NOMINAL IN |
| Longest Vertical Distance Between Mounting Centers | 1.500 INCHES NOMINAL IN |
| Temp Sensing Element Type | CAPILLARY TUBE-BULB |
| Capillary Tube Length | 20.0 INCHES NOMINAL IN |
| Operating Temp Rating | 205.0 FAHRENHEIT MAXIMUM DEGF |
| Nonpile-Up Contact Arrangement | 1 POLE, DOUBLE THROW, ONE POSITION MOMENTARY |
| Media for Which Designed | GAS |
| Contact Adjustability | DEACTUATION POINT NOT ADJUSTABLE AND ACTUATION POINT NOT ADJUSTABLE |
| Longest Horizontal Distance Between Mounting Centers | 0.750 INCHES NOMINAL IN |
| 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 |
|---|---|
| C12-5240 | Ranco Inc Ranco Controls Div (USA) |
| Reference | Meaning |
|---|---|
| 9920332 | 3/9 Design control — primary reference Brewmatic Co |
NSN 5930-00-040-1643 is a Switch,thermostatic, manufactured by Ranco Inc Ranco Controls Div, classified under FSC 5930, Switches. Status: active.
NSN 5930-00-040-1643 has 1 manufacturer part number on file: C12-5240 (Ranco Inc Ranco Controls Div).
Key specifications for C12-5240: Overall Height: 2.250 INCHES NOMINAL IN; Contact Action Stimulus: INCREASE; Terminal Type: TAB, SOLDER LUG; Mounting Facility Pattern: TWO POSITION DIAGONAL. 17 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.