PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

B-545Cap,protective,dust and Moisture

Caplugs Llc Dba Mokon Div Caplugs · NSN 5340-01-139-2895 · FSC 5340 · No Item Name Available
Verified by PartsTable
NSN 5340-01-139-2895 — this item is cataloged by the U.S. Government under National Stock Number 5340-01-139-2895. Primary manufacturer part number: B-545.
Features
  • Cap,protective,dust and Moisture — FSC 5340
  • Opening Inside Diameter for Which Designed: 4.200 INCHES MINIMUM AND 4.520 INCHES MAXIMUM IN
  • Material Document and Classification: L-P-390, TYPE 1, CLASS M, GRADE 1, CATEGORY 3 FED SPEC SINGLE MATERIAL RESPONSE
  • Design Type: FRICTION
  • Inside Diameter Length: 0.950 INCHES NOMINAL IN
  • Round Cap Outside Surface Condition: SMOOTH
  • Material: PLASTIC
  • 4 verified cross-references
Applications
  • Applications requiring Plastic construction
General Description

The Cap,protective,dust and Moisture, cataloged under National Stock Number 5340-01-139-2895, 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 4 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN5340-01-139-2895
Primary Part NumberB-545
Item NameCap,protective,dust and Moisture
FSC / FSG5340 / 53 — No Item Name Available
ManufacturerCaplugs Llc Dba Mokon Div Caplugs
StatusACTIVE
Opening Inside Diameter for Which Designed4.200 INCHES MINIMUM AND 4.520 INCHES MAXIMUM IN
Material Document and ClassificationL-P-390, TYPE 1, CLASS M, GRADE 1, CATEGORY 3 FED SPEC SINGLE MATERIAL RESPONSE
Design TypeFRICTION
Inside Diameter Length0.950 INCHES NOMINAL IN
Round Cap Outside Surface ConditionSMOOTH
MaterialPLASTIC
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Unit of IssueEA
Verified Substitutes 4
3110-00-142-4339B545LY196 INTERCHANGEABLE
Bearing,ball,airframe
Mpb Corp Div Timken Super Precision
4320-00-369-9904B545 INTERCHANGEABLE
Ring,lantern
Clyde Pumps Ltd
3110-00-924-4882B545 INTERCHANGEABLE
Bearing,ball,annular
Skf Usa Inc.
7025-01-473-0850B545 INTERCHANGEABLE
Trackball,data Entry
Lockheed Martin Corporation Div Rms - Manassas
Cross-Reference Index
Part NumberManufacturer
588.50-100003-001 Diehl Defence Gmbh & Co. Kg (DEU)
4904257 Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA)
4904257 Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA)
B-545 PRIMARY Caplugs Llc Dba Mokon Div Caplugs (USA)
Related Parts
3110-00-142-4339INTERCHANGEABLE
BEARING,BALL,AIRFRAME
B545LY196
4320-00-369-9904INTERCHANGEABLE
RING,LANTERN
B545
3110-00-924-4882INTERCHANGEABLE
BEARING,BALL,ANNULAR
B545
7025-01-473-0850INTERCHANGEABLE
TRACKBALL,DATA ENTRY
B545

Frequently Asked Questions

What is NSN 5340-01-139-2895?

NSN 5340-01-139-2895 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 5340-01-139-2895?

NSN 5340-01-139-2895 has 4 cross-referenced part numbers: 588.50-100003-001 (Diehl Defence Gmbh & Co. Kg), 4904257 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), 4904257 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier), B-545 (Caplugs Llc Dba Mokon Div Caplugs).

What NSN replaces 5340-01-139-2895?

There are 4 known substitutes for 5340-01-139-2895: 3110-00-142-4339, 4320-00-369-9904, 3110-00-924-4882 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of B-545?

Key specifications for B-545: Opening Inside Diameter for Which Designed: 4.200 INCHES MINIMUM AND 4.520 INCHES MAXIMUM IN; Material Document and Classification: L-P-390, TYPE 1, CLASS M, GRADE 1, CATEGORY 3 FED SPEC SINGLE MATERIAL RESPONSE; Design Type: FRICTION; Inside Diameter Length: 0.950 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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