The Switch,rotary, cataloged under National Stock Number 5930-01-478-3123, is classified within Federal Supply Class 5930 (Switches) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Northrop Grumman Systems Corporation Div Marine Systems. Government technical data includes 13 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 5930-01-478-3123 |
| Primary Part Number | 2051F50 ITEM 88 |
| Item Name | Switch,rotary |
| FSC / FSG | 5930 / 59 — Switches |
| Manufacturer | Northrop Grumman Systems Corporation Div Marine Systems |
| Status | ACTIVE |
| Switch Contact Basic Design | NONPILE-UP SYMMETRICAL |
| Terminal Type | TAB W/SCREW |
| Contact Load Current Rating | 30.0 AMPERES INDUCTIVE LOAD AC AT SEA LEVEL |
| Mounting Method | THREADED HOLE(S) SINGLE MOUNTING FACILITY |
| Style Designator | TAP, CIRCUIT SELECTOR |
| Individual Section Quantity | 5 |
| Nominal Thread Size | 0.250 INCHES SINGLE MOUNTING FACILITY IN |
| Contact Voltage Rating in Volts | 200.0 AC AT SEA LEVEL |
| Thread Class | 2A SINGLE MOUNTING FACILITY A |
| Switch Actuator Positioning Increment | 90.0 DEGREES SINGLE ACTUATOR |
| Thread Quantity Per Inch | 20 SINGLE MOUNTING FACILITY |
| Switch Actuator Indexing Position Quantity | 2 SINGLE ACTUATOR |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) SINGLE MOUNTING FACILITY |
| 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 |
|---|---|
| 2051F50 ITEM 88 | Northrop Grumman Systems Corporation Div Marine Systems (USA) |
| Reference | Meaning |
|---|---|
| 123110LL | 3/2 Design control — primary reference U.S. Government activity |
| 2051F50 | D/9 Drawing number reference only Northrop Grumman Systems Corporation Div Marine Systems |
NSN 5930-01-478-3123 is a Switch,rotary, manufactured by Northrop Grumman Systems Corporation Div Marine Systems, classified under FSC 5930, Switches. Status: active.
NSN 5930-01-478-3123 has 1 manufacturer part number on file: 2051F50 ITEM 88 (Northrop Grumman Systems Corporation Div Marine Systems).
3 possible matches (shared part number, not a government interchangeability claim): 5940-01-478-5140, 5999-01-478-5196, 5330-01-478-7267. Verify interchangeability with system specifications before substitution.
Key specifications for 2051F50 ITEM 88: Overall Height: 3.6875 INCHES NOMINAL IN; Switch Contact Basic Design: NONPILE-UP SYMMETRICAL; Terminal Type: TAB W/SCREW; Contact Load Current Rating: 30.0 AMPERES INDUCTIVE LOAD AC AT SEA LEVEL. 13 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.