The Switch,rotary, cataloged under National Stock Number 5930-00-256-0147, is classified within Federal Supply Class 5930 (Switches) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Electro Switch Corp. Dba Oak Grisgsby Div Electroswitch. Government technical data includes 27 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 7 items share a part number with this NSN in the catalog (possible match — not a government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 | 5930-00-256-0147 |
| Primary Part Number | 142557DQH |
| Item Name | Switch,rotary |
| FSC / FSG | 5930 / 59 — Switches |
| Manufacturer | Electro Switch Corp. Dba Oak Grisgsby Div Electroswitch |
| Status | ACTIVE |
| Shaft Type | ROUND, FLATTED SINGLE ACTUATOR |
| Shaft Diameter | 0.250 INCHES NOMINAL SINGLE ACTUATOR IN |
| Switch Contact Basic Design | NONPILE-UP SYMMETRICAL |
| Terminal Type | TAB, SOLDER LUG |
| Overall Diameter | 1.852 INCHES NOMINAL IN |
| First Flat Length | 0.375 INCHES NOMINAL SINGLE ACTUATOR IN |
| Precious Material | SILVER |
| Contact Load Current Rating | 500.0 MILLIAMPERES RESISTIVE LOAD AC AT SEA LEVEL |
| Contact Load Current Rating | 1.0 AMPERES RESISTIVE LOAD DC AT SEA LEVEL |
| Mounting Method | THREADED BUSHING SINGLE MOUNTING FACILITY |
| Thread Length | 0.250 INCHES NOMINAL SINGLE MOUNTING FACILITY IN |
| Pole Quantity | 1 SINGLE SECTION REAR |
| Style Designator | CIRCULAR WAFER, BUSHING MOUNT |
| Individual Section Quantity | 1 |
| Nominal Thread Size | 0.375 INCHES SINGLE MOUNTING FACILITY IN |
| Shaft Length | 0.875 INCHES NOMINAL SINGLE ACTUATOR IN |
| Switch Actuator Stop Device Type | FIXED STOP SINGLE ACTUATOR |
| Contact Switching Action | MAKES BEFORE BREAKS SINGLE SECTION REAR |
| Contact Voltage Rating in Volts | 28.0 DC AT SEA LEVEL |
| Contact Voltage Rating in Volts | 110.0 AC AT SEA LEVEL |
| Precious Material and Location | CONTACTS AND ROTOR BLADE SURFACES SILVER |
| Thread Class | 2A SINGLE MOUNTING FACILITY A |
| Switch Actuator Positioning Increment | 30.0 DEGREES SINGLE ACTUATOR |
| Switch Actuator Indexing Position Quantity | 10 SINGLE ACTUATOR |
| Thread Series Designator | UNEF SINGLE MOUNTING FACILITY |
| Flat Height | 0.219 INCHES NOMINAL SINGLE ACTUATOR IN |
| Throw Quantity | 10 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 |
|---|---|
| 340B129 | General Dynamics Mission Systems, Inc. Dba Gdms (USA) |
| 142557DQH PRIMARY | Electro Switch Corp. Dba Oak Grisgsby Div Electroswitch (USA) |
| Reference | Meaning |
|---|---|
| 452-1307 | 5/9 Secondary reference Lockheed Martin Corporation Div Lockheed Martin Information Systems & Global Solutions |
| 340B129 | 5/9 Secondary reference U.S. Government activity |
| 21062 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5930-00-256-0147 is a Switch,rotary, manufactured by Electro Switch Corp. Dba Oak Grisgsby Div Electroswitch, classified under FSC 5930, Switches. Status: active.
NSN 5930-00-256-0147 has 2 manufacturer part numbers on file: 340B129 (General Dynamics Mission Systems, Inc. Dba Gdms), 142557DQH (Electro Switch Corp. Dba Oak Grisgsby Div Electroswitch).
7 possible matches (shared part number, not a government interchangeability claim): 5999-00-948-0026, 5955-01-096-4122, 5977-01-248-6363. Verify interchangeability with system specifications before substitution.
Key specifications for 142557DQH: Shaft Type: ROUND, FLATTED SINGLE ACTUATOR; Shaft Diameter: 0.250 INCHES NOMINAL SINGLE ACTUATOR IN; Switch Contact Basic Design: NONPILE-UP SYMMETRICAL; Terminal Type: TAB, SOLDER LUG. 27 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.