The Switch,liquid Level, cataloged under National Stock Number 5930-01-189-4313, is classified within Federal Supply Class 5930 (Switches) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Madison Company. Government technical data includes 11 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5930-01-189-4313 |
| Primary Part Number | M3109 GROUP2 |
| Item Name | Switch,liquid Level |
| FSC / FSG | 5930 / 59 — Switches |
| Manufacturer | Madison Company |
| Status | ACTIVE |
| Relay | NOT INCLUDED |
| Actuation Method | BUOYANCY |
| AC Voltage Rating | 450.0 VOLTS NOMINAL FIRST OPERATING POWER RQMT |
| Overall Diameter | 5.560 INCHES NOMINAL IN |
| Mounting Method | FLANGE |
| Mounting Position | VERTICAL |
| Float Quantity | 1 |
| Liquid Type for Which Designed | WATER |
| Operating Temp Rating | 50.0 FAHRENHEIT NOMINAL DEGF |
| Mounting Dimensions | 6 SELF LOCKING NUTS SPACED EQUALLY ON A 4.440 IN. BOLT CIRCLE; MOUNTING HOLES 0.560 IN. DIA IN |
| Electrical Connection Type | CONNECTOR RECEPTACLE |
| 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 |
|---|---|
| M3109 GROUP2 PRIMARY | Madison Company (USA) |
| Reference | Meaning |
|---|---|
| M3109 GR0UP2 | C/1 Advisory reference — outside the item-of-supply concept Madison Company |
NSN 5930-01-189-4313 is a Switch,liquid Level, manufactured by Madison Company, classified under FSC 5930, Switches. Status: active.
NSN 5930-01-189-4313 has 1 manufacturer part number on file: M3109 GROUP2 (Madison Company).
Key specifications for M3109 GROUP2: Relay: NOT INCLUDED; Actuation Method: BUOYANCY; AC Voltage Rating: 450.0 VOLTS NOMINAL FIRST OPERATING POWER RQMT; Overall Diameter: 5.560 INCHES NOMINAL IN. 11 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.