PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MS21320-4Switch,sensitive

Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M · NSN 5930-00-404-9178 · FSC 5930 · No Item Name Available
Verified by PartsTable
NSN 5930-00-404-9178 — this item is cataloged by the U.S. Government under National Stock Number 5930-00-404-9178. Primary manufacturer part number: MS21320-4.
Features
  • Switch,sensitive — FSC 5930
  • Switch Release Force: 64.0 INCH-OUNCES MINIMUM IN
  • Terminal Type and Quantity: 6 WIRE LEAD
  • Actuator Roller Width: 0.310 INCHES NOMINAL IN
  • Actuator Height: 0.675 INCHES NOMINAL IN
  • Body Length: 2.820 INCHES MAXIMUM IN
  • Actuator Movement: 16.0 PRETRAVEL DEGREES MINIMUM AND 24.0 PRETRAVEL DEGREES MAXIMUM AND 15.0 OVERTRAVEL DEGREES NOMINAL AND 10.0 DIFFERENTIAL DEGREES MAXIMUM
  • Inclosure Type: FULLY INCLOSED
Applications
  • Circuit control and protection
  • Equipment power management
  • Signal routing
General Description

The Switch,sensitive, cataloged under National Stock Number 5930-00-404-9178, 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 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 24 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 2 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
NSN5930-00-404-9178
Primary Part NumberMS21320-4
Item NameSwitch,sensitive
FSC / FSG5930 / 59 — No Item Name Available
ManufacturerMilitary Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Switch Release Force64.0 INCH-OUNCES MINIMUM IN
Terminal Type and Quantity6 WIRE LEAD
Actuator Roller Width0.310 INCHES NOMINAL IN
Actuator Height0.675 INCHES NOMINAL IN
Body Length2.820 INCHES MAXIMUM IN
Actuator Movement16.0 PRETRAVEL DEGREES MINIMUM AND 24.0 PRETRAVEL DEGREES MAXIMUM AND 15.0 OVERTRAVEL DEGREES NOMINAL AND 10.0 DIFFERENTIAL DEGREES MAXIMUM
Inclosure TypeFULLY INCLOSED
Thread Series DesignatorUNS
Mounting MethodTHREADED BUSHING
Actuator Length1.500 INCHES NOMINAL IN
Maximum Voltage Rating in Volts28.0 DC
Nonpile-Up Contact Arrangement2 POLE, DOUBLE THROW, ONE POSITION MOMENTARY SINGLE SWITCH UNIT
Actuator Roller Diameter0.750 INCHES NOMINAL IN
Hazardous Locations/environmental ProtectionWEATHERPROOF
Body Diameter1.530 INCHES MAXIMUM IN
Nominal Thread Size0.469 INCHES IN
Contact Load Current Rating at Maximum Rated Voltage10.000 AMPERES RESISTIVE DC AND 6.000 AMPERES INDUCTIVE DC AND 6.000 AMPERES MOTOR DC
Switch Actuating Force192.0 INCH-OUNCES MINIMUM AND 400.0 INCH-OUNCES MAXIMUM IN
Test Data Document81349-MIL-S-8805 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
Actuator StyleROLLER ARM
Bushing Length0.340 INCHES NOMINAL IN
Thread Quantity Per Inch32
Specification/standard Data81349-MIL-S-8805/48 GOVERNMENT SPECIFICATION
Body StyleBUSHING MOUNTED
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
5930-00-468-2759 INTERCHANGEABLE
Switch,sensitive
5930-00-957-0306 INTERCHANGEABLE
Switch,sensitive
5930-00-957-0974 INTERCHANGEABLE
Switch,sensitive
5930-01-095-8699 INTERCHANGEABLE
Switch,sensitive
5930-01-247-7394 INTERCHANGEABLE
Switch,sensitive
5930-01-254-0938 INTERCHANGEABLE
Switch,sensitive
Cross-Reference Index
Part NumberManufacturer
MS21320-4 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
MIL-S-8805/48 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-PRF-8805/48 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MS21320-4 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5930-00-468-2759INTERCHANGEABLE
SWITCH,SENSITIVE
5930-00-957-0306INTERCHANGEABLE
SWITCH,SENSITIVE
5930-00-957-0974INTERCHANGEABLE
SWITCH,SENSITIVE
5930-01-095-8699INTERCHANGEABLE
SWITCH,SENSITIVE
5930-01-247-7394INTERCHANGEABLE
SWITCH,SENSITIVE
5930-01-254-0938INTERCHANGEABLE
SWITCH,SENSITIVE

Frequently Asked Questions

What is NSN 5930-00-404-9178?

NSN 5930-00-404-9178 is a Switch,sensitive, manufactured by Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 5930 (No Item Name Available). Status: active.

What are the part numbers for NSN 5930-00-404-9178?

NSN 5930-00-404-9178 has 4 cross-referenced part numbers: MS21320-4 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), MIL-S-8805/48 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-PRF-8805/48 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MS21320-4 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 5930-00-404-9178?

There are 6 known substitutes for 5930-00-404-9178: 5930-00-468-2759, 5930-00-957-0306, 5930-00-957-0974 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MS21320-4?

Key specifications for MS21320-4: Switch Release Force: 64.0 INCH-OUNCES MINIMUM IN; Terminal Type and Quantity: 6 WIRE LEAD; Actuator Roller Width: 0.310 INCHES NOMINAL IN; Actuator Height: 0.675 INCHES NOMINAL IN. 27 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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