PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

4080-2Boot,dust and Moisture Seal

Apm Hexseal Corp · NSN 5340-00-725-1287 · FSC 5340 · No Item Name Available
Verified by PartsTable
NSN 5340-00-725-1287 — this item is cataloged by the U.S. Government under National Stock Number 5340-00-725-1287. Primary manufacturer part number: 4080-2.
Features
  • Boot,dust and Moisture Seal — FSC 5340
  • Mounting Method: THREAD
  • Base Outside Diameter: 1.000 INCHES NOMINAL IN
  • Base Thread Location: INTERNAL
  • Thread Length: 0.250 INCHES NOMINAL IN
  • Material: RUBBER SILICONE BODY
  • Thread Class: 2B
  • Body Outside Diameter: 0.719 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 5340-00-725-1287, is classified within Federal Supply Class 5340 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Apm Hexseal Corp. Government technical data includes 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN5340-00-725-1287
Primary Part Number4080-2
Item NameBoot,dust and Moisture Seal
FSC / FSG5340 / 53 — No Item Name Available
ManufacturerApm Hexseal Corp
StatusCANCELLED
Mounting MethodTHREAD
Base Outside Diameter1.000 INCHES NOMINAL IN
Base Thread LocationINTERNAL
Thread Length0.250 INCHES NOMINAL IN
MaterialRUBBER SILICONE BODY
Thread Class2B
Body Outside Diameter0.719 INCHES NOMINAL IN
Base Inside Diameter0.625 INCHES NOMINAL IN
Thread SeriesUNS
Sealing MethodMECHANICAL
Style DesignatorCLOSED END
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Unit of IssueEA
Verified Substitutes 2
3040-00-099-007740802 INTERCHANGEABLE
Shaft,shouldered
L3harris Technologies, Inc Div Space & Airborne Systems
6850-00-570-936010-8666 INTERCHANGEABLE
Cleaning and Lubricating Compoun
Gc/waldom Inc
Cross-Reference Index
Part NumberManufacturer
4080-2 PRIMARY Apm Hexseal Corp (USA)
4080-2 Dialight Corporation (USA)
Related Parts
3040-00-099-0077INTERCHANGEABLE
SHAFT,SHOULDERED
40802
6850-00-570-9360INTERCHANGEABLE
CLEANING AND LUBRICATING COMPOUN
10-8666

Frequently Asked Questions

What is NSN 5340-00-725-1287?

NSN 5340-00-725-1287 is a Boot,dust and Moisture Seal, manufactured by Apm Hexseal Corp, classified under FSC 5340 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5340-00-725-1287?

NSN 5340-00-725-1287 has 2 cross-referenced part numbers: 4080-2 (Apm Hexseal Corp), 4080-2 (Dialight Corporation).

What NSN replaces 5340-00-725-1287?

There are 2 known substitutes for 5340-00-725-1287: 3040-00-099-0077, 6850-00-570-9360. Verify interchangeability with system specifications before substitution.

What are the specifications of 4080-2?

Key specifications for 4080-2: Mounting Method: THREAD; Base Outside Diameter: 1.000 INCHES NOMINAL IN; Base Thread Location: INTERNAL; Thread Length: 0.250 INCHES NOMINAL IN. 12 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5340-00-725-1287 still in active supply?

NSN 5340-00-725-1287 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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