PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MILB19257ASTYLE1Boot,dust and Moisture Seal

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 5340-00-755-3645 · FSC 5340 · No Item Name Available
Verified by PartsTable
NSN 5340-00-755-3645 — this item is cataloged by the U.S. Government under National Stock Number 5340-00-755-3645. Primary manufacturer part number: MILB19257ASTYLE1.
Features
  • Boot,dust and Moisture Seal — FSC 5340
  • Material: RUBBER SILICONE BODY
  • Hazardous Locations/environmental Protection: DUSTTIGHT-NEMA TYPE 5 AND WATERTIGHT, MIL-B-5423
  • Base Outside Diameter: 0.750 INCHES NOMINAL IN
  • Base Inside Diameter: 0.125 INCHES NOMINAL IN
  • Style Designator: CLOSED END
  • 2 verified cross-references
  • Primary manufacturer: Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
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 5340-00-755-3645, is classified within Federal Supply Class 5340 (No Item Name Available) of the Hardware and Abrasives 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 5 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN5340-00-755-3645
Primary Part NumberMILB19257ASTYLE1
Item NameBoot,dust and Moisture Seal
FSC / FSG5340 / 53 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
MaterialRUBBER SILICONE BODY
Hazardous Locations/environmental ProtectionDUSTTIGHT-NEMA TYPE 5 AND WATERTIGHT, MIL-B-5423
Base Outside Diameter0.750 INCHES NOMINAL IN
Base Inside Diameter0.125 INCHES NOMINAL IN
Style DesignatorCLOSED END
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Unit of IssueEA
Verified Substitutes 8
Boot,dust and Moisture Seal
5340-00-535-9720 INTERCHANGEABLE
Boot,dust and Moisture Seal
5340-00-682-0577 INTERCHANGEABLE
Boot,dust and Moisture Seal
5930-00-823-0482 INTERCHANGEABLE
Boot,dust and Moisture Seal
5340-00-841-1284660355-2 INTERCHANGEABLE
Boot,dust and Moisture Seal
Bae Systems Information and Electronic Systems Integration Inc.
5930-00-933-7075 INTERCHANGEABLE
Boot,dust and Moisture Seal
5930-01-041-3873 INTERCHANGEABLE
Boot,dust and Moisture Seal
5930-01-412-6919 INTERCHANGEABLE
Boot,dust and Moisture Seal
Cross-Reference Index
Part NumberManufacturer
MILB19257ASTYLE1 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-B-5423 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5340-01-097-9929SUCCESSOR
BOOT,DUST AND MOISTURE SEAL
5340-00-535-9720INTERCHANGEABLE
BOOT,DUST AND MOISTURE SEAL
5340-00-682-0577INTERCHANGEABLE
BOOT,DUST AND MOISTURE SEAL
5930-00-823-0482INTERCHANGEABLE
BOOT,DUST AND MOISTURE SEAL
5340-00-841-1284INTERCHANGEABLE
BOOT,DUST AND MOISTURE SEAL
660355-2
5930-00-933-7075INTERCHANGEABLE
BOOT,DUST AND MOISTURE SEAL
5930-01-041-3873INTERCHANGEABLE
BOOT,DUST AND MOISTURE SEAL
5930-01-412-6919INTERCHANGEABLE
BOOT,DUST AND MOISTURE SEAL

Frequently Asked Questions

What is NSN 5340-00-755-3645?

NSN 5340-00-755-3645 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 5340 (No Item Name Available). Status: active.

What are the part numbers for NSN 5340-00-755-3645?

NSN 5340-00-755-3645 has 2 cross-referenced part numbers: MILB19257ASTYLE1 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-B-5423 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 5340-00-755-3645?

There are 8 known substitutes for 5340-00-755-3645: 5340-01-097-9929, 5340-00-535-9720, 5340-00-682-0577 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MILB19257ASTYLE1?

Key specifications for MILB19257ASTYLE1: Material: RUBBER SILICONE BODY; Hazardous Locations/environmental Protection: DUSTTIGHT-NEMA TYPE 5 AND WATERTIGHT, MIL-B-5423; Base Outside Diameter: 0.750 INCHES NOMINAL IN; Base Inside Diameter: 0.125 INCHES NOMINAL IN. 6 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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