The Switch Section,rotary, cataloged under National Stock Number 5930-00-975-9751, 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 24 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5930-00-975-9751 |
| Primary Part Number | 255978-LAM |
| Item Name | Switch Section,rotary |
| FSC / FSG | 5930 / 59 — Switches |
| Manufacturer | Electro Switch Corp. Dba Oak Grisgsby Div Electroswitch |
| Status | ACTIVE |
| Switch Contact Basic Design | NONPILE-UP SYMMETRICAL |
| Terminal Type | TAB, SOLDER LUG |
| Mounting Facility Pattern | TWO POSITION IN-LINE SINGLE MOUNTING FACILITY |
| Contact Load Current Rating | 100.0 MILLIAMPERES RESISTIVE LOAD DC AT ALTITUDE |
| Contact Load Current Rating | 25.0 MILLIAMPERES RESISTIVE LOAD AC AT ALTITUDE |
| Contact Load Current Rating | 50.0 MILLIAMPERES RESISTIVE LOAD AC AT SEA LEVEL |
| Contact Load Current Rating | 200.0 MILLIAMPERES RESISTIVE LOAD AND 20.0 MILLIAMPERES INDUCTIVE LOAD DC AT SEA LEVEL |
| Mounting Method | STRUT AND UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY |
| Unthreaded Mounting Hole Diameter | 0.112 INCHES MINIMUM AND 0.115 INCHES MAXIMUM SINGLE MOUNTING FACILITY IN |
| Pole Quantity | 1 SINGLE SECTION FRONT |
| Pole Quantity | 1 SINGLE SECTION REAR |
| Style Designator | SWITCH SECTION, ROTARY |
| Contact Switching Action | BREAKS BEFORE MAKES SINGLE SECTION REAR |
| Contact Switching Action | BREAKS BEFORE MAKES SINGLE SECTION FRONT |
| Contact Voltage Rating in Volts | 30.0 DC AT ALTITUDE |
| Contact Voltage Rating in Volts | 30.0 DC AT SEA LEVEL |
| Contact Voltage Rating in Volts | 150.0 AC AT ALTITUDE |
| Contact Voltage Rating in Volts | 150.0 AC AT SEA LEVEL |
| Operating Temp Range | -65.0 TO 100.0 CELSIUS DEGC |
| Test Data Document | 81349-MIL-S-3786 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.). |
| Longest Horizontal Distance Between Mounting Centers | 1.562 INCHES NOMINAL SINGLE MOUNTING FACILITY IN |
| Throw Quantity | 18 SINGLE SECTION FRONT |
| Throw Quantity | 18 SINGLE SECTION REAR |
| Body Thickness | 0.088 INCHES NOMINAL IN |
| 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 |
|---|---|
| 255978-LAM PRIMARY | Electro Switch Corp. Dba Oak Grisgsby Div Electroswitch (USA) |
| Reference | Meaning |
|---|---|
| 269-2630-010 | 7/2 Vendor item drawing reference Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems |
| 255978-36PT | 5/9 Secondary reference Electro Switch Corp. Dba Oak Grisgsby Div Electroswitch |
NSN 5930-00-975-9751 is a Switch Section,rotary, manufactured by Electro Switch Corp. Dba Oak Grisgsby Div Electroswitch, classified under FSC 5930, Switches. Status: active.
NSN 5930-00-975-9751 has 1 manufacturer part number on file: 255978-LAM (Electro Switch Corp. Dba Oak Grisgsby Div Electroswitch).
Key specifications for 255978-LAM: Overall Height: 1.832 INCHES NOMINAL IN; Switch Contact Basic Design: NONPILE-UP SYMMETRICAL; Terminal Type: TAB, SOLDER LUG; Mounting Facility Pattern: TWO POSITION IN-LINE SINGLE MOUNTING FACILITY. 24 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.