The Switch,rotary, cataloged under National Stock Number 5930-00-548-5979, is classified within Federal Supply Class 5930 (Switches) of the Electrical and Electronic Equipment Components group. The manufacturer of record is General Dynamics Mission Systems, Inc. Dba Gdms. Government technical data includes 20 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5930-00-548-5979 |
| Primary Part Number | 340CI38 |
| Item Name | Switch,rotary |
| FSC / FSG | 5930 / 59 — Switches |
| Manufacturer | General Dynamics Mission Systems, Inc. Dba Gdms |
| Status | ACTIVE |
| Shaft Type | ROUND, PARALLEL FLATTED SINGLE ACTUATOR |
| Shaft Diameter | 0.248 INCHES NOMINAL SINGLE ACTUATOR IN |
| Switch Contact Basic Design | NONPILE-UP SYMMETRICAL |
| Nonturn Device Radius | 0.531 INCHES NOMINAL AT 10:00 OCLOCK IN |
| Terminal Type | TAB, SOLDER LUG |
| First Flat Length | 0.219 INCHES NOMINAL SINGLE ACTUATOR IN |
| Mounting Method | THREADED BUSHING SINGLE MOUNTING FACILITY |
| Thread Length | 0.375 INCHES NOMINAL SINGLE MOUNTING FACILITY IN |
| Pole Quantity | 2 SINGLE SECTION REAR |
| Individual Section Quantity | 1 |
| Nonturn Device Type | TAB AT 10:00 OCLOCK |
| Nominal Thread Size | 0.375 INCHES SINGLE MOUNTING FACILITY IN |
| Shaft Length | 0.812 INCHES NOMINAL SINGLE ACTUATOR IN |
| Contact Switching Action | MAKES BEFORE BREAKS SINGLE SECTION REAR |
| Switch Actuator Positioning Increment | 30.0 DEGREES SINGLE ACTUATOR |
| Switch Actuator Indexing Position Quantity | 3 SINGLE ACTUATOR |
| Thread Series Designator | UNEF SINGLE MOUNTING FACILITY |
| Shaft Flat/slot Angular Location | 0.0 DEGREES FROM NONTURN DEVICE SINGLE ACTUATOR |
| Flat Height | 0.188 INCHES NOMINAL SINGLE ACTUATOR IN |
| Throw Quantity | 2 SINGLE SECTION REAR |
| 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 |
|---|---|
| 30161-4MLRC1 | Electro Switch Corp. Dba Oak Grisgsby Div Electroswitch (USA) |
| 340CI38 PRIMARY | General Dynamics Mission Systems, Inc. Dba Gdms (USA) |
| Reference | Meaning |
|---|---|
| 30161-4MLRC1 | 5/2 Secondary reference U.S. Government activity |
| 4MLWC1 | 5/9 Secondary reference U.S. Government activity |
| 340CI38 | 5/9 Secondary reference U.S. Government activity |
NSN 5930-00-548-5979 is a Switch,rotary, manufactured by General Dynamics Mission Systems, Inc. Dba Gdms, classified under FSC 5930, Switches. Status: active.
NSN 5930-00-548-5979 has 2 manufacturer part numbers on file: 30161-4MLRC1 (Electro Switch Corp. Dba Oak Grisgsby Div Electroswitch), 340CI38 (General Dynamics Mission Systems, Inc. Dba Gdms).
Key specifications for 340CI38: Shaft Type: ROUND, PARALLEL FLATTED SINGLE ACTUATOR; Shaft Diameter: 0.248 INCHES NOMINAL SINGLE ACTUATOR IN; Switch Contact Basic Design: NONPILE-UP SYMMETRICAL; Nonturn Device Radius: 0.531 INCHES NOMINAL AT 10:00 OCLOCK IN. 20 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.