PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MILB5423-10Boot,dust and Moisture Seal

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 5930-00-687-0948 · FSC 5930 · No Item Name Available
Verified by PartsTable
NSN 5930-00-687-0948 — this item is cataloged by the U.S. Government under National Stock Number 5930-00-687-0948. Primary manufacturer part number: MILB5423-10.
Features
  • Boot,dust and Moisture Seal — FSC 5930
  • Style Designator: CLOSED END
  • Mounting Method: INTEGRAL THREADED NUT
  • Width Across Flats: 0.370 INCHES NOMINAL IN
  • Mounting Device Quantity: 1
  • Thread Quantity Per Inch: 40
  • Base Thread Location: INTERNAL
  • Dome Height: 0.213 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 5930-00-687-0948, 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 17 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5930-00-687-0948
Primary Part NumberMILB5423-10
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 DesignatorCLOSED END
Mounting MethodINTEGRAL THREADED NUT
Width Across Flats0.370 INCHES NOMINAL IN
Mounting Device Quantity1
Thread Quantity Per Inch40
Base Thread LocationINTERNAL
Dome Height0.213 INCHES NOMINAL IN
Sealing MethodCOMPRESSION
Nominal Thread Size0.250 INCHES IN
Opening Inside Diameter0.213 INCHES NOMINAL IN
Thread SeriesUNS
Thread Class2B
Specification/standard Data81349-MIL-B-5423/10 GOVERNMENT SPECIFICATION
MaterialRUBBER SILICONE BODY
Hazardous Locations/environmental ProtectionDUSTPROOF-NEMA TYPE 13 AND WATERTIGHT-NEMA TYPE 4
Thread Length0.072 INCHES NOMINAL IN
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.).
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 2
5930-00-893-1928 INTERCHANGEABLE
Boot,dust and Moisture Seal
5930-00-950-4541 INTERCHANGEABLE
Boot,dust and Moisture Seal
Cross-Reference Index
Part NumberManufacturer
MILB5423-10 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-DTL-5423/10 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
9135265 Us Army Aviation and Missile Command (USA)
5040 Apm Hexseal Corp (USA)
334-2035-020 Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems (USA)
M5423/10-03 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5930-00-893-1928INTERCHANGEABLE
BOOT,DUST AND MOISTURE SEAL
5930-00-950-4541INTERCHANGEABLE
BOOT,DUST AND MOISTURE SEAL

Frequently Asked Questions

What is NSN 5930-00-687-0948?

NSN 5930-00-687-0948 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 5930-00-687-0948?

NSN 5930-00-687-0948 has 6 cross-referenced part numbers: MILB5423-10 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-DTL-5423/10 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 9135265 (Us Army Aviation and Missile Command), 5040 (Apm Hexseal Corp), 334-2035-020 (Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems) and 1 more.

What NSN replaces 5930-00-687-0948?

There are 2 known substitutes for 5930-00-687-0948: 5930-00-893-1928, 5930-00-950-4541. Verify interchangeability with system specifications before substitution.

What are the specifications of MILB5423-10?

Key specifications for MILB5423-10: Style Designator: CLOSED END; Mounting Method: INTEGRAL THREADED NUT; Width Across Flats: 0.370 INCHES NOMINAL IN; Mounting Device Quantity: 1. 18 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5930-00-687-0948 still in active supply?

NSN 5930-00-687-0948 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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