PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

12-1921-1Switch,rotary

Janco Corporation Dba Janco Corp Div Mason Controls · NSN 5930-00-167-8029 · FSC 5930 · No Item Name Available
Verified by PartsTable
NSN 5930-00-167-8029 — this item is cataloged by the U.S. Government under National Stock Number 5930-00-167-8029. Primary manufacturer part number: 12-1921-1.
Features
  • Switch,rotary — FSC 5930
  • Throw Quantity: 18 EACH SECTION REAR
  • Rotor Through Connection Quantity: 1 EACH SECTION
  • Thread Series Designator: UNS SINGLE MOUNTING FACILITY
  • Switch Actuator Indexing Position Quantity: 18 SINGLE ACTUATOR
  • Switch Actuator Positioning Increment: 20.0 DEGREES SINGLE ACTUATOR
  • Individual Section Quantity: 12
  • Contact Switching Action: BREAKS BEFORE MAKES EACH SECTION REAR
Applications
  • Circuit control and protection
  • Equipment power management
  • Signal routing
General Description

The Switch,rotary, cataloged under National Stock Number 5930-00-167-8029, 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 Janco Corporation Dba Janco Corp Div Mason Controls. Government technical data includes 29 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5930-00-167-8029
Primary Part Number12-1921-1
Item NameSwitch,rotary
FSC / FSG5930 / 59 — No Item Name Available
ManufacturerJanco Corporation Dba Janco Corp Div Mason Controls
StatusACTIVE
Throw Quantity18 EACH SECTION REAR
Rotor Through Connection Quantity1 EACH SECTION
Thread Series DesignatorUNS SINGLE MOUNTING FACILITY
Switch Actuator Indexing Position Quantity18 SINGLE ACTUATOR
Switch Actuator Positioning Increment20.0 DEGREES SINGLE ACTUATOR
Individual Section Quantity12
Contact Switching ActionBREAKS BEFORE MAKES EACH SECTION REAR
Style DesignatorTAP, CIRCULAR, BUSHING MOUNT
Switch Actuator Stop Device TypeADJUSTABLE STOP SINGLE ACTUATOR
Contact Load Current Rating3.0 AMPERES RESISTIVE LOAD AND 2.0 AMPERES INDUCTIVE LOAD DC AT SEA LEVEL
Contact Load Current Rating5.0 AMPERES RESISTIVE LOAD AC AT SEA LEVEL
Contact Voltage Rating in Volts75.0 AC AT SEA LEVEL
Nonturn Device Radius0.372 INCHES NOMINAL AT 12:00 OCLOCK IN
Shaft TypeROUND, FLATTED SINGLE ACTUATOR
Nonturn Device TypeTAB AT 12:00 OCLOCK
Thread Quantity Per Inch32 SINGLE MOUNTING FACILITY
Shaft Diameter0.250 INCHES NOMINAL SINGLE ACTUATOR IN
Switch Contact Basic DesignNONPILE-UP SYMMETRICAL
First Flat Length0.250 INCHES NOMINAL SINGLE ACTUATOR IN
Overall Diameter2.000 INCHES MAXIMUM IN
Shaft Length0.375 INCHES NOMINAL SINGLE ACTUATOR IN
Flat Height0.210 INCHES NOMINAL SINGLE ACTUATOR IN
Mounting MethodTHREADED BUSHING SINGLE MOUNTING FACILITY
Nominal Thread Size0.469 INCHES SINGLE MOUNTING FACILITY IN
Pole Quantity1 EACH SECTION FRONT
Terminal TypeTAB, SOLDER LUG
Contact Voltage Rating in Volts28.0 DC AT SEA LEVEL
Thread Class2A SINGLE MOUNTING FACILITY A
Thread Length0.375 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
4730-00-277-8750SAE J246 4-2 120102BA INTERCHANGEABLE
Adapter,straight,pipe to Tube
Sae International Dba Sae International
Cross-Reference Index
Part NumberManufacturer
12-1921-1 PRIMARY Janco Corporation Dba Janco Corp Div Mason Controls (USA)
935129-1 Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp (USA)
Related Parts
4730-00-277-8750INTERCHANGEABLE
ADAPTER,STRAIGHT,PIPE TO TUBE
SAE J246 4-2 120102BA

Frequently Asked Questions

What is NSN 5930-00-167-8029?

NSN 5930-00-167-8029 is a Switch,rotary, manufactured by Janco Corporation Dba Janco Corp Div Mason Controls, classified under FSC 5930 (No Item Name Available). Status: active.

What are the part numbers for NSN 5930-00-167-8029?

NSN 5930-00-167-8029 has 2 cross-referenced part numbers: 12-1921-1 (Janco Corporation Dba Janco Corp Div Mason Controls), 935129-1 (Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp).

What NSN replaces 5930-00-167-8029?

There is 1 known substitute for 5930-00-167-8029: 4730-00-277-8750. Verify interchangeability with system specifications before substitution.

What are the specifications of 12-1921-1?

Key specifications for 12-1921-1: Throw Quantity: 18 EACH SECTION REAR; Rotor Through Connection Quantity: 1 EACH SECTION; Thread Series Designator: UNS SINGLE MOUNTING FACILITY; Switch Actuator Indexing Position Quantity: 18 SINGLE ACTUATOR. 30 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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