PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

FS127-934Switch,rotary

Asco Power Services Inc Dba Asco Emergency Power Maintenance Incorporated · NSN 5930-00-786-1857 · FSC 5930 · No Item Name Available
Verified by PartsTable
NSN 5930-00-786-1857 — this item is cataloged by the U.S. Government under National Stock Number 5930-00-786-1857. Primary manufacturer part number: FS127-934.
Features
  • Switch,rotary — FSC 5930
  • Contact Voltage Rating in Volts: 120.0 DC AT SEA LEVEL
  • Thread Quantity Per Inch: 24 SINGLE MOUNTING FACILITY
  • Rotor Through Connection Quantity: 2 SINGLE SECTION
  • Switch Actuator Momentary Position: CLOCKWISE SINGLE ACTUATOR
  • Switch Contact Basic Design: NONPILE-UP SYMMETRICAL
  • Switch Actuator Indexing Position Quantity: 2 SINGLE ACTUATOR
  • Contact Load Current Rating: 10.0 AMPERES RESISTIVE LOAD DC AT SEA LEVEL
Applications
  • Circuit control and protection
  • Equipment power management
  • Signal routing
General Description

The Switch,rotary, cataloged under National Stock Number 5930-00-786-1857, 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 Asco Power Services Inc Dba Asco Emergency Power Maintenance Incorporated. Government technical data includes 24 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 13 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5930-00-786-1857
Primary Part NumberFS127-934
Item NameSwitch,rotary
FSC / FSG5930 / 59 — No Item Name Available
ManufacturerAsco Power Services Inc Dba Asco Emergency Power Maintenance Incorporated
StatusCANCELLED
Contact Voltage Rating in Volts120.0 DC AT SEA LEVEL
Thread Quantity Per Inch24 SINGLE MOUNTING FACILITY
Rotor Through Connection Quantity2 SINGLE SECTION
Switch Actuator Momentary PositionCLOCKWISE SINGLE ACTUATOR
Switch Contact Basic DesignNONPILE-UP SYMMETRICAL
Switch Actuator Indexing Position Quantity2 SINGLE ACTUATOR
Contact Load Current Rating10.0 AMPERES RESISTIVE LOAD DC AT SEA LEVEL
Thread Class2B SINGLE MOUNTING FACILITY
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SINGLE MOUNTING FACILITY
Mounting MethodBRACKET(S) AND THREADED HOLE(S) SINGLE MOUNTING FACILITY
Hazardous Locations/environmental ProtectionEXPLOSION PROOF
Individual Section Quantity1
Terminal TypeTAB W/SCREW
Switch Actuator Stop Device TypeFIXED STOP SINGLE ACTUATOR
Pole Quantity2 SINGLE SECTION FRONT
Style DesignatorTAP, CIRCUIT SELECTOR
Switch Actuator Positioning Increment90.0 DEGREES SINGLE ACTUATOR
Contact Switching ActionBREAKS BEFORE MAKES SINGLE SECTION REAR
Mounting Facility PatternFOUR POSITION CIRCULAR SINGLE MOUNTING FACILITY
Knob Manufacturer Code82121
Mounting Facility Circle Radius1.156 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
Throw Quantity1 SINGLE SECTION REAR
Features ProvidedACTUATOR KNOB
Nominal Thread Size0.190 INCHES SINGLE MOUNTING FACILITY IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 6
6240-00-012-7934 INTERCHANGEABLE
Lamp,incandescent
5330-00-178-63932187 INTERCHANGEABLE
Seal,plain Encased
Eaton Aerospace, Llc Dba Jackson South
5962-00-433-640612793-4 INTERCHANGEABLE
Microcircuit,memory
Northrop Grumman Systems Corp Dba Northrop Grumman Systems Corp
1680-00-517-83883116 INTERCHANGEABLE
Filter,aircraft Instruments
Safran Power Usa Llc
5330-00-825-345899129797 INTERCHANGEABLE
Gasket
Alfa Laval Inc
2815-01-127-3598127934 INTERCHANGEABLE
Insert,valve Seat
Cummins Inc.
Cross-Reference Index
Part NumberManufacturer
FS127-934 Asco Power Services Inc Dba Asco Emergency Power Maintenance Incorporated (USA)
FS127-934 Automatic Switch Company Dba Asco (USA)
127-934 Asco Power Services Inc Dba Asco Emergency Power Maintenance Incorporated (USA)
29-797 Automatic Switch Company Dba Asco (USA)
C10133B Electro Switch Corp. Dba Electro Switch Corp (USA)
29-797 Asco Power Services Inc Dba Asco Emergency Power Maintenance Incorporated (USA)
122101LG Electro Switch Corp. Dba Electro Switch Corp (USA)
NC10133B Electro Switch Corp. Dba Electro Switch Corp (USA)
293-051 ITEM 13 Asco Power Services Inc Dba Asco Emergency Power Maintenance Incorporated (USA)
127-934 Automatic Switch Company Dba Asco (USA)
FS37-032 Automatic Switch Company Dba Asco (USA)
122101LG Kay Industries Inc (USA)
293-051 ITEM 13 Automatic Switch Company Dba Asco (USA)
Related Parts
6240-00-012-7934INTERCHANGEABLE
LAMP,INCANDESCENT
5330-00-178-6393INTERCHANGEABLE
SEAL,PLAIN ENCASED
2187
5962-00-433-6406INTERCHANGEABLE
MICROCIRCUIT,MEMORY
12793-4
1680-00-517-8388INTERCHANGEABLE
FILTER,AIRCRAFT INSTRUMENTS
3116
5330-00-825-3458INTERCHANGEABLE
GASKET
99129797
2815-01-127-3598INTERCHANGEABLE
INSERT,VALVE SEAT
127934

Frequently Asked Questions

What is NSN 5930-00-786-1857?

NSN 5930-00-786-1857 is a Switch,rotary, manufactured by Asco Power Services Inc Dba Asco Emergency Power Maintenance Incorporated, classified under FSC 5930 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5930-00-786-1857?

NSN 5930-00-786-1857 has 13 cross-referenced part numbers: FS127-934 (Asco Power Services Inc Dba Asco Emergency Power Maintenance Incorporated), FS127-934 (Automatic Switch Company Dba Asco), 127-934 (Asco Power Services Inc Dba Asco Emergency Power Maintenance Incorporated), 29-797 (Automatic Switch Company Dba Asco), C10133B (Electro Switch Corp. Dba Electro Switch Corp) and 8 more.

What NSN replaces 5930-00-786-1857?

There are 6 known substitutes for 5930-00-786-1857: 6240-00-012-7934, 5330-00-178-6393, 5962-00-433-6406 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of FS127-934?

Key specifications for FS127-934: Contact Voltage Rating in Volts: 120.0 DC AT SEA LEVEL; Thread Quantity Per Inch: 24 SINGLE MOUNTING FACILITY; Overall Length: 2.250 INCHES NOMINAL IN; Rotor Through Connection Quantity: 2 SINGLE SECTION. 27 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5930-00-786-1857 still in active supply?

NSN 5930-00-786-1857 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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