PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

M3123JSwitch,rotary

Mallory Controls Co Sub of Emhart Industries Inc · NSN 5930-00-274-3991 · FSC 5930 · No Item Name Available
Verified by PartsTable
NSN 5930-00-274-3991 — this item is cataloged by the U.S. Government under National Stock Number 5930-00-274-3991. Primary manufacturer part number: M3123J.
Features
  • Switch,rotary — FSC 5930
  • Contact Load Current Rating: 250.0 MILLIAMPERES RESISTIVE LOAD HIGHEST AC VOLTAGE RATING AT SEA LEVEL
  • Thread Series Designator: UNEF SINGLE MOUNTING FACILITY
  • Contact Load Current Rating: 5.0 AMPERES RESISTIVE LOAD LOWEST AC VOLTAGE RATING AT SEA LEVEL
  • Terminal Type: TAB, SOLDER LUG
  • Contact Load Current Rating: 5.0 AMPERES RESISTIVE LOAD LOWEST DC VOLTAGE RATING AT SEA LEVEL
  • Contact Load Current Rating: 200.0 MILLIAMPERES RESISTIVE LOAD HIGHEST DC VOLTAGE RATING AT SEA LEVEL
  • Contact Voltage Rating in Volts: 300.0 HIGHEST AC VOLTAGE RATING AT SEA LEVEL
Applications
  • Circuit control and protection
  • Equipment power management
  • Signal routing
General Description

The Switch,rotary, cataloged under National Stock Number 5930-00-274-3991, is classified within Federal Supply Class 5930 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Mallory Controls Co Sub of Emhart Industries Inc. Government technical data includes 28 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5930-00-274-3991
Primary Part NumberM3123J
Item NameSwitch,rotary
FSC / FSG5930 / 59 — No Item Name Available
ManufacturerMallory Controls Co Sub of Emhart Industries Inc
StatusACTIVE
Contact Load Current Rating250.0 MILLIAMPERES RESISTIVE LOAD HIGHEST AC VOLTAGE RATING AT SEA LEVEL
Thread Series DesignatorUNEF SINGLE MOUNTING FACILITY
Contact Load Current Rating5.0 AMPERES RESISTIVE LOAD LOWEST AC VOLTAGE RATING AT SEA LEVEL
Terminal TypeTAB, SOLDER LUG
Contact Load Current Rating5.0 AMPERES RESISTIVE LOAD LOWEST DC VOLTAGE RATING AT SEA LEVEL
Contact Load Current Rating200.0 MILLIAMPERES RESISTIVE LOAD HIGHEST DC VOLTAGE RATING AT SEA LEVEL
Contact Voltage Rating in Volts300.0 HIGHEST AC VOLTAGE RATING AT SEA LEVEL
Individual Section Quantity1
Switch Actuator Positioning Increment30.0 DEGREES SINGLE ACTUATOR
Mounting MethodTHREADED BUSHING SINGLE MOUNTING FACILITY
Contact Voltage Rating in Volts300.0 HIGHEST DC VOLTAGE RATING AT SEA LEVEL
Style DesignatorTAP, CIRCULAR, BUSHING MOUNT
Switch Contact Basic DesignNONPILE-UP SYMMETRICAL
Shaft Diameter0.249 INCHES NOMINAL SINGLE ACTUATOR IN
Pole Quantity2 SINGLE SECTION FRONT
Features ProvidedMETALLIC INCLOSURE
Overall Diameter1.250 INCHES NOMINAL IN
Thread Class2A SINGLE MOUNTING FACILITY A
Contact Voltage Rating in Volts6.0 LOWEST AC VOLTAGE RATING AT SEA LEVEL
Nominal Thread Size0.375 INCHES SINGLE MOUNTING FACILITY IN
Switch Actuator Stop Device TypeFIXED STOP SINGLE ACTUATOR
Switch Actuator Indexing Position Quantity3 SINGLE ACTUATOR
Contact Switching ActionMAKES BEFORE BREAKS SINGLE SECTION FRONT
Shaft TypeROUND SINGLE ACTUATOR
Shaft Length2.000 INCHES NOMINAL SINGLE ACTUATOR IN
Throw Quantity3 SINGLE SECTION FRONT
Contact Voltage Rating in Volts6.0 LOWEST DC VOLTAGE RATING AT SEA LEVEL
Thread Length0.375 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
6240-00-295-11841034 INTERCHANGEABLE
Lamp,incandescent
American National Standards Institute Incorporated Dba American National Standards Institute
1650-00-452-589135051 INTERCHANGEABLE
Retainer Piston H
Goodrich Actuation Systems Ltd
5935-00-946-1272ESC194240GR11 INTERCHANGEABLE
Connector,plug,electrical
Army, United States Department of the Dba Diorectorate of Production Engineering Div Tobyhanna Army Depot
3040-01-005-1610SR11075A INTERCHANGEABLE
Connecting Link,rigid
Sps Technologies Llc Dba Shur-Lok Company Div Aerospace Engineered Products Division
5955-01-038-0084 INTERCHANGEABLE
Oscillator,crystal Controlled
2540-01-619-75813505-1 INTERCHANGEABLE
Towbar,motor Vehicle
Pdi Ground Support Systems, Inc.
Cross-Reference Index
Part NumberManufacturer
M3123J Mallory Controls Co Sub of Emhart Industries Inc (USA)
B112697 Mallory Controls Co Sub of Emhart Industries Inc (USA)
50C6453P1 Westinghouse Electric Corp Power Generation-Generator Div (USA)
35051 Telephonics Corp (USA)
Related Parts
6240-00-295-1184INTERCHANGEABLE
LAMP,INCANDESCENT
1034
1650-00-452-5891INTERCHANGEABLE
RETAINER PISTON H
35051
5935-00-946-1272INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
ESC194240GR11
3040-01-005-1610INTERCHANGEABLE
CONNECTING LINK,RIGID
SR11075A
5955-01-038-0084INTERCHANGEABLE
OSCILLATOR,CRYSTAL CONTROLLED
2540-01-619-7581INTERCHANGEABLE
TOWBAR,MOTOR VEHICLE
3505-1

Frequently Asked Questions

What is NSN 5930-00-274-3991?

NSN 5930-00-274-3991 is a Switch,rotary, manufactured by Mallory Controls Co Sub of Emhart Industries Inc, classified under FSC 5930 (No Item Name Available). Status: active.

What are the part numbers for NSN 5930-00-274-3991?

NSN 5930-00-274-3991 has 4 cross-referenced part numbers: M3123J (Mallory Controls Co Sub of Emhart Industries Inc), B112697 (Mallory Controls Co Sub of Emhart Industries Inc), 50C6453P1 (Westinghouse Electric Corp Power Generation-Generator Div), 35051 (Telephonics Corp).

What NSN replaces 5930-00-274-3991?

There are 6 known substitutes for 5930-00-274-3991: 6240-00-295-1184, 1650-00-452-5891, 5935-00-946-1272 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of M3123J?

Key specifications for M3123J: Contact Load Current Rating: 250.0 MILLIAMPERES RESISTIVE LOAD HIGHEST AC VOLTAGE RATING AT SEA LEVEL; Thread Series Designator: UNEF SINGLE MOUNTING FACILITY; Contact Load Current Rating: 5.0 AMPERES RESISTIVE LOAD LOWEST AC VOLTAGE RATING AT SEA LEVEL; Terminal Type: TAB, SOLDER LUG. 29 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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