PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

54A125-338O-Ring

Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier · NSN 5331-00-599-1000 · FSC 5331 · O-Ring
Verified by PartsTable
NSN 5331-00-599-1000 — this item is cataloged by the U.S. Government under National Stock Number 5331-00-599-1000. Primary manufacturer part number: 54A125-338.
Features
  • O-Ring — FSC 5331
  • Material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
  • Cross-Sectional Height: 0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN
  • Center Hole Diameter: 3.085 INCHES MINIMUM AND 3.115 INCHES MAXIMUM IN
  • Outside Diameter: 3.486 INCHES MINIMUM AND 3.554 INCHES MAXIMUM IN
  • 27 verified cross-references
  • Primary manufacturer: Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
  • Applications requiring Rubber Butadiene-Acrylonitrile Class Nbr construction
General Description

The O-Ring, cataloged under National Stock Number 5331-00-599-1000, is classified within Federal Supply Class 5331 (O-Ring) of the Hardware and Abrasives group. The primary manufacturer of record is Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 27 commercial cross-references from 18 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5331-00-599-1000
Primary Part Number54A125-338
Item NameO-Ring
FSC / FSG5331 / 53 — O-Ring
ManufacturerNavair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
StatusCANCELLED
MaterialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
Cross-Sectional Height0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN
Center Hole Diameter3.085 INCHES MINIMUM AND 3.115 INCHES MAXIMUM IN
Outside Diameter3.486 INCHES MINIMUM AND 3.554 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 4
5331-00-641-4350 INTERCHANGEABLE
O-Ring
5331-01-162-470572721-21X3 PIECE 12 INTERCHANGEABLE
O-Ring
Electric Boat Corporation Div General Dynamics Electric Boat
2915-01-182-9815622741 INTERCHANGEABLE
Impeller
Eaton Aerospace, Llc Dba Jackson South
5945-01-406-5904LC1D65AB7 INTERCHANGEABLE
Contact Set,relay
Schneider Electric Usa, Inc.
Cross-Reference Index
Part NumberManufacturer
54A125-338 PRIMARY Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA)
6227-41 Trelleborg Sealing Solutions El Segundo, Inc. Dba Tss El Segundo (USA)
N230-7-2-338 Parker-Hannifin Corporation Dba Pneutronics Div Composite Sealing Systems Division (USA)
P48026-338 Acushnet Rubber Company, Inc. Dba Precix (USA)
N0304 2-338 PRIMARY Parker-Hannifin Corp Div O-Ring Division (USA)
MS28775-338 Society of Automotive Engineers Inc (USA)
MILP25732 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
1446-338 Parker-Hannifin Corporation Div O-Ring Division (USA)
2-338 N230-70 PRIMARY Parker-Hannifin Corp Div O-Ring Division (USA)
MS28784-338 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
1376-05-323 Leonardo S.p.a. - Electronics Division - Defence Business Area (ITA)
7377-338 Parker Hannifin Corporation Div O-Ring Division (USA)
MS28775-338 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
2-338 N304-74 Parker-Hannifin Corp Div O-Ring Division (USA)
137605323 Leonardo S.p.a. - Electronics Division - Defence Business Area (ITA)
2300-79203 Leonardo S.p.a. - Electronics Division - Defence Business Area (ITA)
BACP11T338 PRIMARY The Boeing Company (USA)
4067-70-338 Parco, Llc (USA)
N0230 2-338 PRIMARY Parker-Hannifin Corp Div O-Ring Division (USA)
BACP11T338 The Boeing Company Div Defense (USA)
Related Parts
5331-00-641-4350INTERCHANGEABLE
O-RING
5331-01-162-4705INTERCHANGEABLE
O-RING
72721-21X3 PIECE 12
2915-01-182-9815INTERCHANGEABLE
IMPELLER
622741
5945-01-406-5904INTERCHANGEABLE
CONTACT SET,RELAY
LC1D65AB7

Frequently Asked Questions

What is NSN 5331-00-599-1000?

NSN 5331-00-599-1000 is a O-Ring, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 5331 (O-Ring). Status: cancelled.

What are the part numbers for NSN 5331-00-599-1000?

NSN 5331-00-599-1000 has 27 cross-referenced part numbers: 54A125-338 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), 6227-41 (Trelleborg Sealing Solutions El Segundo, Inc. Dba Tss El Segundo), N230-7-2-338 (Parker-Hannifin Corporation Dba Pneutronics Div Composite Sealing Systems Division), P48026-338 (Acushnet Rubber Company, Inc. Dba Precix), N0304 2-338 (Parker-Hannifin Corp Div O-Ring Division) and 22 more.

What NSN replaces 5331-00-599-1000?

There are 4 known substitutes for 5331-00-599-1000: 5331-00-641-4350, 5331-01-162-4705, 2915-01-182-9815 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 54A125-338?

Key specifications for 54A125-338: Material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR; Cross-Sectional Height: 0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN; Center Hole Diameter: 3.085 INCHES MINIMUM AND 3.115 INCHES MAXIMUM IN; Outside Diameter: 3.486 INCHES MINIMUM AND 3.554 INCHES MAXIMUM IN. 4 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5331-00-599-1000 still in active supply?

NSN 5331-00-599-1000 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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