PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

40427Breather Assembly

Eaton Corporation Dba Eaton Inoac · NSN 4930-01-307-2721 · FSC 4930 · No Item Name Available
Verified by PartsTable
NSN 4930-01-307-2721 — this item is cataloged by the U.S. Government under National Stock Number 4930-01-307-2721. Primary manufacturer part number: 40427.
Features
  • Breather Assembly — FSC 4930
  • 4 verified cross-references
  • Primary manufacturer: Eaton Corporation Dba Eaton Inoac
Applications
  • Maintenance depot operations
  • Field repair and servicing
  • Vehicle maintenance facilities
General Description

The Breather Assembly, cataloged under National Stock Number 4930-01-307-2721, is classified within Federal Supply Class 4930 (No Item Name Available) of the Maintenance and Repair Shop Equipment group. The primary manufacturer of record is Eaton Corporation Dba Eaton Inoac. This item has 4 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameBreather Assembly
FSC / FSG4930 — No Item Name Available (FSG 49)
ManufacturersSAS Avifil (CAGE F9901); Nimikkeistokeskus Ncb Finland (CAGE A486G); Eaton Corporation Dba Airframe Div Fuel & Motion Control Systems (CAGE 86090); Eaton Corporation Dba Eaton Inoac (CAGE 0DT23)
Technical Specifications
ParameterValue
NSN4930-01-307-2721
Primary Part Number40427
Item NameBreather Assembly
FSC / FSG4930 / 49 — No Item Name Available
ManufacturerEaton Corporation Dba Eaton Inoac
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
4820-00-105-8277 INTERCHANGEABLE
Valve,pneumatic Tank
5905-00-176-2458A404.27 INTERCHANGEABLE
Resistor,fixed,film
Ward Leonard Ct Llc
5315-00-187-3256MS24692-81 INTERCHANGEABLE
Pin,tapered,plain
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5950-00-578-862140427 INTERCHANGEABLE
Transformer,power
Hanovia Specialty Lighting Llc
5950-00-660-4644 INTERCHANGEABLE
Transformer,power
5962-01-078-574440427 INTERCHANGEABLE
Microcircuit,digital
Raytheon Company Div Rmd Strategic
5950-01-147-6935280191 INTERCHANGEABLE
Transformer,power
Astra Products Co., Inc. of Tampa Dba Astra Products Co Inc of Tampa
5310-01-729-412240427 INTERCHANGEABLE
Nut,plain,hexagon
Hartzell Engine Technologies Llc
Cross-Reference Index
Part NumberManufacturer
40427 SAS Avifil (FRA)
10314823 Nimikkeistokeskus Ncb Finland (FIN)
40427 Eaton Corporation Dba Airframe Div Fuel & Motion Control Systems (USA)
40427 PRIMARY Eaton Corporation Dba Eaton Inoac (USA)
Related Parts
4820-00-105-8277INTERCHANGEABLE
VALVE,PNEUMATIC TANK
5905-00-176-2458INTERCHANGEABLE
RESISTOR,FIXED,FILM
A404.27
5315-00-187-3256INTERCHANGEABLE
PIN,TAPERED,PLAIN
MS24692-81
5950-00-578-8621INTERCHANGEABLE
TRANSFORMER,POWER
40427
5950-00-660-4644INTERCHANGEABLE
TRANSFORMER,POWER
5962-01-078-5744INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
40427
5950-01-147-6935INTERCHANGEABLE
TRANSFORMER,POWER
280191
5310-01-729-4122INTERCHANGEABLE
NUT,PLAIN,HEXAGON
40427

Frequently Asked Questions

What is NSN 4930-01-307-2721?

NSN 4930-01-307-2721 is a Breather Assembly, manufactured by Eaton Corporation Dba Eaton Inoac, classified under FSC 4930 (No Item Name Available). Status: active.

What are the part numbers for NSN 4930-01-307-2721?

NSN 4930-01-307-2721 has 4 cross-referenced part numbers: 40427 (SAS Avifil), 10314823 (Nimikkeistokeskus Ncb Finland), 40427 (Eaton Corporation Dba Airframe Div Fuel & Motion Control Systems), 40427 (Eaton Corporation Dba Eaton Inoac).

What NSN replaces 4930-01-307-2721?

There are 8 known substitutes for 4930-01-307-2721: 4820-00-105-8277, 5905-00-176-2458, 5315-00-187-3256 and 5 more. Verify interchangeability with system specifications before substitution.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com