PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

144EX457Breather

Oshkosh Defense Llc · NSN 2520-01-137-5744 · FSC 2520 · No Item Name Available
Verified by PartsTable
NSN 2520-01-137-5744 — this item is cataloged by the U.S. Government under National Stock Number 2520-01-137-5744. Primary manufacturer part number: 144EX457.
Features
  • Breather — FSC 2520
  • 3 verified cross-references
  • Primary manufacturer: Oshkosh Defense Llc
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Breather, cataloged under National Stock Number 2520-01-137-5744, is classified within Federal Supply Class 2520 (No Item Name Available) of the Vehicular Equipment Components group. The primary manufacturer of record is Oshkosh Defense Llc. This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameBreather
FSC / FSG2520 — No Item Name Available (FSG 25)
ManufacturersOshkosh Corp (CAGE 45152); Dana Commercial Vehicle Products, Llc (CAGE 52304); Oshkosh Defense Llc (CAGE 75Q65)
Technical Specifications
ParameterValue
NSN2520-01-137-5744
Primary Part Number144EX457
Item NameBreather
FSC / FSG2520 / 25 — No Item Name Available
ManufacturerOshkosh Defense Llc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
4710-00-037-674025110 INTERCHANGEABLE
Tube Assembly,metal
Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.
5360-00-209-905825110 INTERCHANGEABLE
Spring,helical,compression
Meggitt North Hollywood Inc
5133-00-228-1325 INTERCHANGEABLE
Drill,twist
5930-00-241-89228105173 INTERCHANGEABLE
Switch,toggle
Us Army Aviation and Missile Command
6210-00-247-177725CSPREDFACETED INTERCHANGEABLE
Lens,light
Chicago Miniature Lighting Llc Dba Chicago Miniature Optoelectron
5977-00-280-8106 INTERCHANGEABLE
Brush Set,electrical Contact
4530-00-911-6302 INTERCHANGEABLE
Nozzle,oil Burner,pressure Atomi
6130-01-033-080925110 INTERCHANGEABLE
Power Supply
Transistor Devices Inc Div Astrodyne Tdi High Power Business Unit
5365-01-495-54763088A321 INTERCHANGEABLE
Shim
Mcmaster-Carr Supply Co
5340-01-522-528325110 INTERCHANGEABLE
Clamp,loop
Waytek Inc
Cross-Reference Index
Part NumberManufacturer
144EX457 Oshkosh Corp (USA)
25110 Dana Commercial Vehicle Products, Llc (USA)
144EX457 PRIMARY Oshkosh Defense Llc (USA)
Related Parts
4710-00-037-6740INTERCHANGEABLE
TUBE ASSEMBLY,METAL
25110
5360-00-209-9058INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
25110
5133-00-228-1325INTERCHANGEABLE
DRILL,TWIST
5930-00-241-8922INTERCHANGEABLE
SWITCH,TOGGLE
8105173
6210-00-247-1777INTERCHANGEABLE
LENS,LIGHT
25CSPREDFACETED
5977-00-280-8106INTERCHANGEABLE
BRUSH SET,ELECTRICAL CONTACT
4530-00-911-6302INTERCHANGEABLE
NOZZLE,OIL BURNER,PRESSURE ATOMI
6130-01-033-0809INTERCHANGEABLE
POWER SUPPLY
25110
5365-01-495-5476INTERCHANGEABLE
SHIM
3088A321
5340-01-522-5283INTERCHANGEABLE
CLAMP,LOOP
25110
6515-01-571-1689INTERCHANGEABLE
VENTILATOR,VOLUME,PORTABLE
70000K

Frequently Asked Questions

What is NSN 2520-01-137-5744?

NSN 2520-01-137-5744 is a Breather, manufactured by Oshkosh Defense Llc, classified under FSC 2520 (No Item Name Available). Status: active.

What are the part numbers for NSN 2520-01-137-5744?

NSN 2520-01-137-5744 has 3 cross-referenced part numbers: 144EX457 (Oshkosh Corp), 25110 (Dana Commercial Vehicle Products, Llc), 144EX457 (Oshkosh Defense Llc).

What NSN replaces 2520-01-137-5744?

There are 11 known substitutes for 2520-01-137-5744: 4710-00-037-6740, 5360-00-209-9058, 5133-00-228-1325 and 8 more. Verify interchangeability with system specifications before substitution.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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