PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

LL-HX4-3931O-Ring

Defense Logistics Agency Dba Defense Supply Center Philadelphia · NSN 5331-01-234-6376 · FSC 5331 · O-Ring
Verified by PartsTable
NSN 5331-01-234-6376 — this item is cataloged by the U.S. Government under National Stock Number 5331-01-234-6376. Primary manufacturer part number: LL-HX4-3931.
Features
  • O-Ring — FSC 5331
  • Test Data Document: 81349-MIL-P-23199 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
  • Material: RUBBER ETHYLENE-PROPYLENE CLASS EPM
  • Cross-Sectional Height: 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
  • Criticality Code Justification: ZZZY
  • Center Hole Diameter: 1.287 INCHES MINIMUM AND 1.311 INCHES MAXIMUM IN
  • Reference Number Differentiating Characteristics: AS DIFFERENTIATED BY MATERIAL WHICH MUST CONFORM TO SHIPS PARTS CONTROL CENTER SPECIAL QUALITY CONTROL PROVISIONS AND CERTIFIED FREE FROM MERCURY CONTAMINATION
  • 2 verified cross-references
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
  • Applications requiring Rubber Ethylene-Propylene Class Epm construction
General Description

The O-Ring, cataloged under National Stock Number 5331-01-234-6376, is classified within Federal Supply Class 5331 (O-Ring) of the Hardware and Abrasives group. The primary manufacturer of record is Defense Logistics Agency Dba Defense Supply Center Philadelphia. 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. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5331-01-234-6376
Primary Part NumberLL-HX4-3931
Item NameO-Ring
FSC / FSG5331 / 53 — O-Ring
ManufacturerDefense Logistics Agency Dba Defense Supply Center Philadelphia
StatusACTIVE
Test Data Document81349-MIL-P-23199 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
MaterialRUBBER ETHYLENE-PROPYLENE CLASS EPM
Cross-Sectional Height0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
Criticality Code JustificationZZZY
Center Hole Diameter1.287 INCHES MINIMUM AND 1.311 INCHES MAXIMUM IN
Reference Number Differentiating CharacteristicsAS DIFFERENTIATED BY MATERIAL WHICH MUST CONFORM TO SHIPS PARTS CONTROL CENTER SPECIAL QUALITY CONTROL PROVISIONS AND CERTIFIED FREE FROM MERCURY CONTAMINATION
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
5331-00-480-84052-125E540-8 INTERCHANGEABLE
O-Ring
Parker-Hannifin Corp Div O-Ring Division
Cross-Reference Index
Part NumberManufacturer
LL-HX4-3931 Defense Logistics Agency Dba Defense Supply Center Philadelphia (USA)
2-125E540-80 Parker-Hannifin Corp Div O-Ring Division (USA)
Related Parts
5331-00-480-8405INTERCHANGEABLE
O-RING
2-125E540-8

Frequently Asked Questions

What is NSN 5331-01-234-6376?

NSN 5331-01-234-6376 is a O-Ring, manufactured by Defense Logistics Agency Dba Defense Supply Center Philadelphia, classified under FSC 5331 (O-Ring). Status: active.

What are the part numbers for NSN 5331-01-234-6376?

NSN 5331-01-234-6376 has 2 cross-referenced part numbers: LL-HX4-3931 (Defense Logistics Agency Dba Defense Supply Center Philadelphia), 2-125E540-80 (Parker-Hannifin Corp Div O-Ring Division).

What NSN replaces 5331-01-234-6376?

There is 1 known substitute for 5331-01-234-6376: 5331-00-480-8405. Verify interchangeability with system specifications before substitution.

What are the specifications of LL-HX4-3931?

Key specifications for LL-HX4-3931: Test Data Document: 81349-MIL-P-23199 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).; Material: RUBBER ETHYLENE-PROPYLENE CLASS EPM; Cross-Sectional Height: 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN; Criticality Code Justification: ZZZY. 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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