PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

N9030X1/4RFIBoot,dust and Moisture Seal

Apm Hexseal Corp · NSN 5930-00-491-8714 · FSC 5930 · No Item Name Available
Verified by PartsTable
NSN 5930-00-491-8714 — this item is cataloged by the U.S. Government under National Stock Number 5930-00-491-8714. Primary manufacturer part number: N9030X1/4RFI.
Features
  • Boot,dust and Moisture Seal — FSC 5930
  • Mounting Method: THREAD
  • Mounting Device Quantity: 1
  • Style Designator: THRU-HOLE
  • Sealing Method: COMPRESSION AND PACKING
  • Material Thickness: 0.005 INCHES NOMINAL IN
  • Nominal Thread Size: 0.375 INCHES IN
  • Width Across Flats: 0.500 INCHES NOMINAL IN
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
General Description

The Boot,dust and Moisture Seal, cataloged under National Stock Number 5930-00-491-8714, 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 Apm Hexseal Corp. Government technical data includes 13 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 11 commercial cross-references from 8 manufacturers, 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
NSN5930-00-491-8714
Primary Part NumberN9030X1/4RFI
Item NameBoot,dust and Moisture Seal
FSC / FSG5930 / 59 — No Item Name Available
ManufacturerApm Hexseal Corp
StatusCANCELLED
Mounting MethodTHREAD
Mounting Device Quantity1
Style DesignatorTHRU-HOLE
Sealing MethodCOMPRESSION AND PACKING
Material Thickness0.005 INCHES NOMINAL IN
Nominal Thread Size0.375 INCHES IN
Width Across Flats0.500 INCHES NOMINAL IN
Base Thread LocationINTERNAL
Thread SeriesUNEF
Test Data Document81349-MIL-DTL-5423/9 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.).
Thread Class2B
Thread Length0.175 INCHES NOMINAL IN
FSC Application DataSWITCH,ROTARY
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5930-00-140-3241 INTERCHANGEABLE
Boot,dust and Moisture Seal
5930-00-402-1021 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
N9030X1/4RFI Apm Hexseal Corp (USA)
M5423/09-08 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
N909U1-4RF1 Apm Hexseal Corp (USA)
77C714218P001 Lockheed Martin Corporation Div Rms (USA)
T380010302 Lockheed Martin Librascope Corporation (USA)
3550003-003 Northrop Grumman Systems Corp Dba Northrop Grumman Systems Corp (USA)
P5423-001-01 Us Army Aviation and Missile Command (USA)
MIL-DTL-5423/9 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
504353 FIND NO.24 Lockheed Martin Corporation Dba Lockheed Martin (USA)
MIL-B-5423/9 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
M5423/09-08 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5930-00-140-3241INTERCHANGEABLE
BOOT,DUST AND MOISTURE SEAL
5930-00-402-1021INTERCHANGEABLE
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
5930-01-154-0858INTERCHANGEABLE
BOOT,DUST AND MOISTURE SEAL
5930-01-154-3828INTERCHANGEABLE
BOOT,DUST AND MOISTURE SEAL
77C14218P001

Frequently Asked Questions

What is NSN 5930-00-491-8714?

NSN 5930-00-491-8714 is a Boot,dust and Moisture Seal, manufactured by Apm Hexseal Corp, classified under FSC 5930 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5930-00-491-8714?

NSN 5930-00-491-8714 has 11 cross-referenced part numbers: N9030X1/4RFI (Apm Hexseal Corp), M5423/09-08 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), N909U1-4RF1 (Apm Hexseal Corp), 77C714218P001 (Lockheed Martin Corporation Div Rms), T380010302 (Lockheed Martin Librascope Corporation) and 6 more.

What NSN replaces 5930-00-491-8714?

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

What are the specifications of N9030X1/4RFI?

Key specifications for N9030X1/4RFI: Mounting Method: THREAD; Mounting Device Quantity: 1; Style Designator: THRU-HOLE; Sealing Method: COMPRESSION AND PACKING. 14 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5930-00-491-8714 still in active supply?

NSN 5930-00-491-8714 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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