The Switch,rotary, cataloged under National Stock Number 5930-01-286-7783, is classified within Federal Supply Class 5930 (Switches) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Howell Laboratories Inc Dba Howell Laboratories Inc. Government technical data includes 18 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5930-01-286-7783 |
| Primary Part Number | 4381C-G503 |
| Item Name | Switch,rotary |
| FSC / FSG | 5930 / 59 — Switches |
| Manufacturer | Howell Laboratories Inc Dba Howell Laboratories Inc |
| Status | ACTIVE |
| Switch Contact Basic Design | NONPILE-UP NONSYMMETRICAL |
| Terminal Type | TAB W/SCREW |
| Mounting Facility Pattern | FOUR POSITION CIRCULAR SINGLE MOUNTING FACILITY |
| Mounting Facility Circle Radius | 1.609 INCHES NOMINAL SINGLE MOUNTING FACILITY IN |
| Contact Load Current Rating | 30.0 AMPERES RESISTIVE LOAD DC AT SEA LEVEL |
| Contact Load Current Rating | 30.0 AMPERES RESISTIVE LOAD AC AT SEA LEVEL |
| Mounting Method | BRACKET(S) AND THREADED HOLE(S) SINGLE MOUNTING FACILITY |
| Style Designator | TAP, CIRCUIT SELECTOR |
| Individual Section Quantity | 5 |
| Features Provided | ACTUATOR KNOB |
| Nominal Thread Size | 0.250 INCHES SINGLE MOUNTING FACILITY IN |
| Contact Voltage Rating in Volts | 250.0 DC AT SEA LEVEL |
| Contact Voltage Rating in Volts | 500.0 AC AT SEA LEVEL |
| Thread Class | 2B SINGLE MOUNTING FACILITY |
| Switch Actuator Positioning Increment | 90.0 DEGREES SINGLE ACTUATOR |
| Thread Quantity Per Inch | 20 SINGLE MOUNTING FACILITY |
| Switch Actuator Indexing Position Quantity | 4 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 |
|---|---|
| 4381C-G503 PRIMARY | Howell Laboratories Inc Dba Howell Laboratories Inc (USA) |
| Reference | Meaning |
|---|---|
| 123105AA | 5/2 Secondary reference U.S. Government activity |
NSN 5930-01-286-7783 is a Switch,rotary, manufactured by Howell Laboratories Inc Dba Howell Laboratories Inc, classified under FSC 5930, Switches. Status: active.
NSN 5930-01-286-7783 has 1 manufacturer part number on file: 4381C-G503 (Howell Laboratories Inc Dba Howell Laboratories Inc).
Key specifications for 4381C-G503: Overall Height: 2.531 INCHES NOMINAL IN; Switch Contact Basic Design: NONPILE-UP NONSYMMETRICAL; Terminal Type: TAB W/SCREW; Mounting Facility Pattern: FOUR POSITION CIRCULAR SINGLE MOUNTING FACILITY. 18 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.