PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

B104Cap,protective,dust and Moisture

Caplugs Llc Dba Mokon Div Caplugs · NSN 5340-00-491-7583 · FSC 5340 · No Item Name Available
Verified by PartsTable
NSN 5340-00-491-7583 — this item is cataloged by the U.S. Government under National Stock Number 5340-00-491-7583. Primary manufacturer part number: B104.
Features
  • Cap,protective,dust and Moisture — FSC 5340
  • Round Cap Outside Surface Condition: SMOOTH
  • Inside Diameter Length: 2.500 INCHES NOMINAL IN
  • Material: PLASTIC, POLYETHYLENE (PP)
  • Tube Outside Diameter for Which Designed: 0.875 INCHES NOMINAL IN
  • Design Type: FRICTION
  • Overall Diameter: 0.965 INCHES NOMINAL IN
  • 2 verified cross-references
Applications
  • Applications requiring Plastic, Polyethylene (pp) construction
General Description

The Cap,protective,dust and Moisture, cataloged under National Stock Number 5340-00-491-7583, is classified within Federal Supply Class 5340 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Caplugs Llc Dba Mokon Div Caplugs. Government technical data includes 6 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. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN5340-00-491-7583
Primary Part NumberB104
Item NameCap,protective,dust and Moisture
FSC / FSG5340 / 53 — No Item Name Available
ManufacturerCaplugs Llc Dba Mokon Div Caplugs
StatusACTIVE
Round Cap Outside Surface ConditionSMOOTH
Inside Diameter Length2.500 INCHES NOMINAL IN
MaterialPLASTIC, POLYETHYLENE (PP)
Tube Outside Diameter for Which Designed0.875 INCHES NOMINAL IN
Design TypeFRICTION
Overall Diameter0.965 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Unit of IssueEA
Verified Substitutes 8
5940-00-143-4780MS25036-108 INTERCHANGEABLE
Terminal,lug
Sae International Dba Sae International
4730-00-256-981100104-0004-1 INTERCHANGEABLE
Cup,oil,lubricating
Gits Mfg Co Inc
2050-00-851-678822104 INTERCHANGEABLE
Buoy,marker
Taylor Nelson a Co Inc
5910-01-122-8809 INTERCHANGEABLE
Capacitor
4820-01-424-5408B104 INTERCHANGEABLE
Valve,gate
Stockham Valves and Fittings Inc
5998-01-442-3834B104 INTERCHANGEABLE
Circuit Card Assembly
Lockheed Martin Corp Dba Lockheed Martin Div Mst - Eagan
5340-01-696-9332B-104 INTERCHANGEABLE
Bumper
Blue Moon Designs, Llc Dba Blue Moon Designs
5305-01-717-5698B104 INTERCHANGEABLE
Screw,machine
Really Right Stuff Llc
Cross-Reference Index
Part NumberManufacturer
B104 Protective Closures Co Inc (USA)
B104 PRIMARY Caplugs Llc Dba Mokon Div Caplugs (USA)
Related Parts
5940-00-143-4780INTERCHANGEABLE
TERMINAL,LUG
MS25036-108
4730-00-256-9811INTERCHANGEABLE
CUP,OIL,LUBRICATING
00104-0004-1
2050-00-851-6788INTERCHANGEABLE
BUOY,MARKER
22104
5910-01-122-8809INTERCHANGEABLE
CAPACITOR
4820-01-424-5408INTERCHANGEABLE
VALVE,GATE
B104
5998-01-442-3834INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
B104
5340-01-696-9332INTERCHANGEABLE
BUMPER
B-104
5305-01-717-5698INTERCHANGEABLE
SCREW,MACHINE
B104

Frequently Asked Questions

What is NSN 5340-00-491-7583?

NSN 5340-00-491-7583 is a Cap,protective,dust and Moisture, manufactured by Caplugs Llc Dba Mokon Div Caplugs, classified under FSC 5340 (No Item Name Available). Status: active.

What are the part numbers for NSN 5340-00-491-7583?

NSN 5340-00-491-7583 has 2 cross-referenced part numbers: B104 (Protective Closures Co Inc), B104 (Caplugs Llc Dba Mokon Div Caplugs).

What NSN replaces 5340-00-491-7583?

There are 8 known substitutes for 5340-00-491-7583: 5940-00-143-4780, 4730-00-256-9811, 2050-00-851-6788 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of B104?

Key specifications for B104: Round Cap Outside Surface Condition: SMOOTH; Inside Diameter Length: 2.500 INCHES NOMINAL IN; Material: PLASTIC, POLYETHYLENE (PP); Tube Outside Diameter for Which Designed: 0.875 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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