PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

721857-39Switch,thermostatic

Raytheon Company Div Rmd Strategic · NSN 5930-01-123-9509 · FSC 5930 · No Item Name Available
Verified by PartsTable
NSN 5930-01-123-9509 — this item is cataloged by the U.S. Government under National Stock Number 5930-01-123-9509. Primary manufacturer part number: 721857-39.
Features
  • Switch,thermostatic — FSC 5930
  • Contact Load Current Rating: 2.0 AMPERES RESISTIVE LOAD FIRST VOLTAGE
  • Style Designator: CYLINDRICAL W/FLANGE
  • Contact Adjustability: DEACTUATION POINT NOT ADJUSTABLE AND ACTUATION POINT NOT ADJUSTABLE
  • Contact Voltage Rating in Volts: 115.0 AC AT SEA LEVEL FIRST VOLTAGE
  • Width Across Flats: 1.000 INCHES NOMINAL IN
  • Contact Load Current Rating: 5.0 AMPERES RESISTIVE LOAD SECOND VOLTAGE
  • Nonpile-Up Contact Arrangement: 1 POLE, SINGLE THROW, NORMALLY CLOSED, MOMENTARY ACTION
Applications
  • Circuit control and protection
  • Equipment power management
  • Signal routing
General Description

The Switch,thermostatic, cataloged under National Stock Number 5930-01-123-9509, 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 Raytheon Company Div Rmd Strategic. Government technical data includes 20 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. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5930-01-123-9509
Primary Part Number721857-39
Item NameSwitch,thermostatic
FSC / FSG5930 / 59 — No Item Name Available
ManufacturerRaytheon Company Div Rmd Strategic
StatusACTIVE
Contact Load Current Rating2.0 AMPERES RESISTIVE LOAD FIRST VOLTAGE
Style DesignatorCYLINDRICAL W/FLANGE
Contact AdjustabilityDEACTUATION POINT NOT ADJUSTABLE AND ACTUATION POINT NOT ADJUSTABLE
Contact Voltage Rating in Volts115.0 AC AT SEA LEVEL FIRST VOLTAGE
Width Across Flats1.000 INCHES NOMINAL IN
Contact Load Current Rating5.0 AMPERES RESISTIVE LOAD SECOND VOLTAGE
Nonpile-Up Contact Arrangement1 POLE, SINGLE THROW, NORMALLY CLOSED, MOMENTARY ACTION
Thread Series DesignatorNPT SINGLE THREADED BUSHING
Terminal TypeWIRE LEAD
Mounting MethodTHREADED BUSHING
Body Length3.000 INCHES NOMINAL IN
Contact Voltage Rating in Volts28.0 DC AT SEA LEVEL SECOND VOLTAGE
Contact Action StimulusINCREASE
Nominal Thread Size0.500 INCHES SINGLE THREADED BUSHING IN
Thread Length0.710 INCHES NOMINAL SINGLE THREADED BUSHING IN
Body Diameter0.635 INCHES MINIMUM AND 0.665 INCHES MAXIMUM IN
Thread Quantity Per Inch14 SINGLE THREADED BUSHING
Temp Sensing Element TypeIMMERSION WELL
Media for Which DesignedGAS OR LIQUID
Contact Stimulus Rating145.00 ACTUATION POINT NOMINAL DEGREES FAHRENHEIT AND 140.00 DEACTUATION POINT NOMINAL DEGREES FAHRENHEIT
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
2520-00-163-247121926 INTERCHANGEABLE
Fork
Komatsu America Corporation
3110-00-191-046015BA INTERCHANGEABLE
Retainer and Rollers,bearing
The Timken Corporation
5915-00-254-1225FA11-664 INTERCHANGEABLE
Filter,radio Frequency Interfere
Ems Development Corporation Dba Ems Development Corp
2910-00-356-130921130 INTERCHANGEABLE
Carburator,elbow
Briggs and Stratton Corp
5340-00-400-00716011-5CC INTERCHANGEABLE
Clip,spring Tension
Te Connectivity Corporation
3120-00-948-049921926 INTERCHANGEABLE
Bushing,sleeve
Hamilton Sundstrand Corporation Dba Collins Aerospace
5305-01-077-971421926 INTERCHANGEABLE
Screw,machine
Astrocom Electronics Inc
3120-01-127-367721926 INTERCHANGEABLE
Bearing,washer,thrust
Westerbeke Corporation
4730-01-224-731021926 INTERCHANGEABLE
Nipple,pipe
Crane Pumps & Systems Pft Corp Div Crane Pumps & System Pft Corp.
4730-01-438-091011721 INTERCHANGEABLE
Adapter,straight,tube to Hose
Clemco Industries Corp. Dba Clemco Industries Corp Div Clemco
Cross-Reference Index
Part NumberManufacturer
21926 Sensata Technologies, Inc. Div Sensata Attleboro (USA)
721857-39 PRIMARY Raytheon Company Div Rmd Strategic (USA)
Related Parts
2520-00-163-2471INTERCHANGEABLE
FORK
21926
3110-00-191-0460INTERCHANGEABLE
RETAINER AND ROLLERS,BEARING
15BA
5915-00-254-1225INTERCHANGEABLE
FILTER,RADIO FREQUENCY INTERFERE
FA11-664
2910-00-356-1309INTERCHANGEABLE
CARBURATOR,ELBOW
21130
5340-00-400-0071INTERCHANGEABLE
CLIP,SPRING TENSION
6011-5CC
3120-00-948-0499INTERCHANGEABLE
BUSHING,SLEEVE
21926
5305-01-077-9714INTERCHANGEABLE
SCREW,MACHINE
21926
3120-01-127-3677INTERCHANGEABLE
BEARING,WASHER,THRUST
21926
4730-01-224-7310INTERCHANGEABLE
NIPPLE,PIPE
21926
4730-01-438-0910INTERCHANGEABLE
ADAPTER,STRAIGHT,TUBE TO HOSE
11721
6515-01-540-1599INTERCHANGEABLE
TUBE,DRAW WASTE
21926

Frequently Asked Questions

What is NSN 5930-01-123-9509?

NSN 5930-01-123-9509 is a Switch,thermostatic, manufactured by Raytheon Company Div Rmd Strategic, classified under FSC 5930 (No Item Name Available). Status: active.

What are the part numbers for NSN 5930-01-123-9509?

NSN 5930-01-123-9509 has 2 cross-referenced part numbers: 21926 (Sensata Technologies, Inc. Div Sensata Attleboro), 721857-39 (Raytheon Company Div Rmd Strategic).

What NSN replaces 5930-01-123-9509?

There are 11 known substitutes for 5930-01-123-9509: 2520-00-163-2471, 3110-00-191-0460, 5915-00-254-1225 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 721857-39?

Key specifications for 721857-39: Contact Load Current Rating: 2.0 AMPERES RESISTIVE LOAD FIRST VOLTAGE; Style Designator: CYLINDRICAL W/FLANGE; Overall Length: 3.380 INCHES NOMINAL IN; End Item Identification: HULL OBRP. 22 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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