PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

M5423/09-09Boot,dust and Moisture Seal

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 5930-00-140-3241 · FSC 5930 · No Item Name Available
Verified by PartsTable
NSN 5930-00-140-3241 — this item is cataloged by the U.S. Government under National Stock Number 5930-00-140-3241. Primary manufacturer part number: M5423/09-09.
Features
  • Boot,dust and Moisture Seal — FSC 5930
  • Style Designator: THRU-HOLE
  • Thread Series: UNEF
  • FSC Application Data: SWITCH,ROTARY.
  • Test Data Document: 81349-MIL-B-5423 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.).
  • Base Thread Location: INTERNAL
  • Nominal Thread Size: 0.250 INCHES IN
  • Width Across Flats: 0.375 INCHES NOMINAL IN
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
  • Applications requiring Rubber Silicone Body construction
General Description

The Boot,dust and Moisture Seal, cataloged under National Stock Number 5930-00-140-3241, 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 Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 16 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5930-00-140-3241
Primary Part NumberM5423/09-09
Item NameBoot,dust and Moisture Seal
FSC / FSG5930 / 59 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusCANCELLED
Style DesignatorTHRU-HOLE
Thread SeriesUNEF
FSC Application DataSWITCH,ROTARY.
Test Data Document81349-MIL-B-5423 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.).
Base Thread LocationINTERNAL
Nominal Thread Size0.250 INCHES IN
Width Across Flats0.375 INCHES NOMINAL IN
MaterialRUBBER SILICONE BODY
Thread Quantity Per Inch32
Specification/standard Data81349-MIL-B-5423/9 GOVERNMENT SPECIFICATION
Opening Inside Diameter0.125 INCHES NOMINAL IN
Thread Length0.175 INCHES NOMINAL IN
Thread Class2B
Mounting Device Quantity1
Material Thickness0.020 INCHES NOMINAL IN
Mounting MethodINTEGRAL THREADED NUT
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5930-00-402-1021 INTERCHANGEABLE
Boot,dust and Moisture Seal
5930-00-491-8714 INTERCHANGEABLE
Boot,dust and Moisture Seal
5930-00-496-7492N9060X1/4 INTERCHANGEABLE
Boot,dust and Moisture Seal
Apm Hexseal Corp
5930-00-816-6119 INTERCHANGEABLE
Boot,dust and Moisture Seal
5930-00-823-0482 INTERCHANGEABLE
Boot,dust and Moisture Seal
5930-00-823-0573 INTERCHANGEABLE
Boot,dust and Moisture Seal
5930-00-892-9026N9040 1-8 INTERCHANGEABLE
Boot,dust and Moisture Seal
Apm Hexseal Corp
5930-00-904-5904 INTERCHANGEABLE
Boot,dust and Moisture Seal
5930-00-982-9261 INTERCHANGEABLE
Boot,dust and Moisture Seal
5930-00-987-8829 INTERCHANGEABLE
Boot,dust and Moisture Seal
Cross-Reference Index
Part NumberManufacturer
M5423/09-09 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-DTL-5423/9 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MILB5423-9 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5930-00-402-1021INTERCHANGEABLE
BOOT,DUST AND MOISTURE SEAL
5930-00-491-8714INTERCHANGEABLE
BOOT,DUST AND MOISTURE SEAL
5930-00-496-7492INTERCHANGEABLE
BOOT,DUST AND MOISTURE SEAL
N9060X1/4
5930-00-816-6119INTERCHANGEABLE
BOOT,DUST AND MOISTURE SEAL
5930-00-823-0482INTERCHANGEABLE
BOOT,DUST AND MOISTURE SEAL
5930-00-823-0573INTERCHANGEABLE
BOOT,DUST AND MOISTURE SEAL
5930-00-892-9026INTERCHANGEABLE
BOOT,DUST AND MOISTURE SEAL
N9040 1-8
5930-00-904-5904INTERCHANGEABLE
BOOT,DUST AND MOISTURE SEAL
5930-00-982-9261INTERCHANGEABLE
BOOT,DUST AND MOISTURE SEAL
5930-00-987-8829INTERCHANGEABLE
BOOT,DUST AND MOISTURE SEAL
5330-01-098-0350INTERCHANGEABLE
SEAL,SPECIAL
M5423/09-09
5930-01-154-0858INTERCHANGEABLE
BOOT,DUST AND MOISTURE SEAL

Frequently Asked Questions

What is NSN 5930-00-140-3241?

NSN 5930-00-140-3241 is a Boot,dust and Moisture Seal, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 5930 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5930-00-140-3241?

NSN 5930-00-140-3241 has 3 cross-referenced part numbers: M5423/09-09 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-DTL-5423/9 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MILB5423-9 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 5930-00-140-3241?

There are 12 known substitutes for 5930-00-140-3241: 5930-00-402-1021, 5930-00-491-8714, 5930-00-496-7492 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of M5423/09-09?

Key specifications for M5423/09-09: Style Designator: THRU-HOLE; Thread Series: UNEF; FSC Application Data: SWITCH,ROTARY.; Test Data Document: 81349-MIL-B-5423 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.).. 17 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5930-00-140-3241 still in active supply?

NSN 5930-00-140-3241 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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