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Technical Data Sheet
PartsTable / MRO / 121904ML
121904ML ✓ Verified by PartsTable
— · MRO · MRO_GENERAL
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

The SWITCH,ROTARY is a the manufacturer industrial component. Key specifications include shaft_type: ROUND SINGLE ACTUATOR, shaft_length: 0.938 INCHES NOMINAL SINGLE ACTUATOR IN, terminal_type: TAB W/SCREW, shaft_diameter: 0.250 INCHES NOMINAL SINGLE ACTUATOR IN, features_provided: ACTUATOR KNOB, nominal_thread_size: 0.190 INCHES SINGLE MOUNTING FACILITY IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5930-00-201-2581, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
MRO→ MRO_GENERAL→ 121904ML
NSN: 5930-00-201-2581
FSC: 5930
CAGE: 82121 — ELECTRO SWITCH CORP. DBA ELECTRO SWITCH CORP (USA)
SPECIFICATIONS
shaft_typeROUND SINGLE ACTUATOR
shaft_length0.938 INCHES NOMINAL SINGLE ACTUATOR IN
terminal_typeTAB W/SCREW
shaft_diameter0.250 INCHES NOMINAL SINGLE ACTUATOR IN
features_providedACTUATOR KNOB
nominal_thread_size0.190 INCHES SINGLE MOUNTING FACILITY IN
knob_manufacturer_code82121
thread_quantity_per_inch24 SINGLE MOUNTING FACILITY
thread_series_designatorUNIFIED NATIONAL COARSE (UNC) SINGLE MOUNTING FACILITY
mounting_facility_patternFOUR POSITION CIRCULAR SINGLE MOUNTING FACILITY
contact_load_current_rating10.0 AMPERES RESISTIVE LOAD AC AT SEA LEVEL
individual_section_quantity4
NSN5930-00-201-2581
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available SWITCH,ROTARY TITLE COMPONENT PN 121904ML MFR SWITCH,ROTARY
KEY FEATURES
•
INDIVIDUAL SECTION QUANTITY: 4
•
TERMINAL TYPE: TAB W/SCREW
•
SWITCH ACTUATOR POSITIONING INCREMENT: 90.0 DEGREES SINGLE ACTUATOR
•
KNOB MANUFACTURER CODE: 82121
•
THREAD QUANTITY PER INCH: 24 SINGLE MOUNTING FACILITY
•
SHAFT DIAMETER: 0.250 INCHES NOMINAL SINGLE ACTUATOR IN
•
CONTACT VOLTAGE RATING IN VOLTS: 125.0 AC AT SEA LEVEL
•
CONTACT LOAD CURRENT RATING: 10.0 AMPERES RESISTIVE LOAD AC AT SEA LEVEL
TECHNICAL CHARACTERISTICS (FLIS)
INDIVIDUAL SECTION QUANTITY4
TERMINAL TYPETAB W/SCREW
SWITCH ACTUATOR POSITIONING INCREMENT90.0 DEGREES SINGLE ACTUATOR
KNOB MANUFACTURER CODE82121
THREAD QUANTITY PER INCH24 SINGLE MOUNTING FACILITY
SHAFT DIAMETER0.250 INCHES NOMINAL SINGLE ACTUATOR IN
CONTACT VOLTAGE RATING IN VOLTS125.0 AC AT SEA LEVEL
CONTACT LOAD CURRENT RATING10.0 AMPERES RESISTIVE LOAD AC AT SEA LEVEL
MOUNTING FACILITY PATTERNFOUR POSITION CIRCULAR SINGLE MOUNTING FACILITY
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC) SINGLE MOUNTING FACILITY
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
B8AZ6659AInterchangeable
interchangeable cross-reference
interchangeable
8269Interchangeable
interchangeable cross-reference
interchangeable
C43699PC89Interchangeable
interchangeable cross-reference
interchangeable
L882-1AInterchangeable
interchangeable cross-reference
interchangeable
4B8761Interchangeable
interchangeable cross-reference
interchangeable
714267Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 121904ML?
121904ML is a SWITCH,ROTARY. It is classified as a MRO (MRO_GENERAL).
What parts can replace 121904ML?
There are 15 known substitutes for 121904ML: B8AZ6659A, 8269, C43699PC89 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 121904ML?
121904ML is cataloged in the Federal Logistics Information System (FLIS) under NSN 5930-00-201-2581. This indicates validated use in U.S. government and defense supply chains.
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PartsTable Design LLC · partstable.com
Last verified: July 2026