PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

AS3581-221O-Ring

Society of Automotive Engineers Inc · NSN 5331-00-338-1382 · FSC 5331 · O-Ring
Verified by PartsTable
NSN 5331-00-338-1382 — this item is cataloged by the U.S. Government under National Stock Number 5331-00-338-1382. Primary manufacturer part number: AS3581-221.
Features
  • O-Ring — FSC 5331
  • Temp Rating: -20.0 FAHRENHEIT AND 400.0 FAHRENHEIT DEGF
  • Center Hole Diameter: 1.409 INCHES MINIMUM AND 1.433 INCHES MAXIMUM IN
  • Outside Diameter: 1.699 INCHES NOMINAL IN
  • Cross-Sectional Height: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
  • Material: RUBBER FLUOROCARBON CLASS FPM
  • Hardness Rating: 90.0 SHORE DUROMETER A NOMINAL
  • 9 verified cross-references
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
  • Applications requiring Rubber Fluorocarbon Class Fpm construction
General Description

The O-Ring, cataloged under National Stock Number 5331-00-338-1382, is classified within Federal Supply Class 5331 (O-Ring) of the Hardware and Abrasives group. The primary manufacturer of record is Society of Automotive Engineers Inc. Government technical data includes 6 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 9 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5331-00-338-1382
Primary Part NumberAS3581-221
Item NameO-Ring
FSC / FSG5331 / 53 — O-Ring
ManufacturerSociety of Automotive Engineers Inc
StatusCANCELLED
Temp Rating-20.0 FAHRENHEIT AND 400.0 FAHRENHEIT DEGF
Center Hole Diameter1.409 INCHES MINIMUM AND 1.433 INCHES MAXIMUM IN
Outside Diameter1.699 INCHES NOMINAL IN
Cross-Sectional Height0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
MaterialRUBBER FLUOROCARBON CLASS FPM
Hardness Rating90.0 SHORE DUROMETER A NOMINAL
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 2
5330-00-091-4313H136-094 INTERCHANGEABLE
Packing,preformed
Hunt Valve Company, Inc.
5331-01-595-6536AS3581-221 INTERCHANGEABLE
O-Ring
Sae International Dba Sae International
Cross-Reference Index
Part NumberManufacturer
AS3581-221 Society of Automotive Engineers Inc (USA)
NAS1594-221 Zf Industrieantriebe Witten Gmbh (DEU)
M83248/2-221 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
AMS7259D Society of Automotive Engineers Inc (USA)
ARP568-221MILR2 5897CL2 Zf Industrieantriebe Witten Gmbh (DEU)
MILR83248 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
ARP568-221MILR2 5897TY1CL2 Zf Industrieantriebe Witten Gmbh (DEU)
H136-94 Zf Industrieantriebe Witten Gmbh (DEU)
M83248/2-221 Zf Industrieantriebe Witten Gmbh (DEU)
Related Parts
5330-00-091-4313INTERCHANGEABLE
PACKING,PREFORMED
H136-094
5331-01-595-6536INTERCHANGEABLE
O-RING
AS3581-221

Frequently Asked Questions

What is NSN 5331-00-338-1382?

NSN 5331-00-338-1382 is a O-Ring, manufactured by Society of Automotive Engineers Inc, classified under FSC 5331 (O-Ring). Status: cancelled.

What are the part numbers for NSN 5331-00-338-1382?

NSN 5331-00-338-1382 has 9 cross-referenced part numbers: AS3581-221 (Society of Automotive Engineers Inc), NAS1594-221 (Zf Industrieantriebe Witten Gmbh), M83248/2-221 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), AMS7259D (Society of Automotive Engineers Inc), ARP568-221MILR2 5897CL2 (Zf Industrieantriebe Witten Gmbh) and 4 more.

What NSN replaces 5331-00-338-1382?

There are 2 known substitutes for 5331-00-338-1382: 5330-00-091-4313, 5331-01-595-6536. Verify interchangeability with system specifications before substitution.

What are the specifications of AS3581-221?

Key specifications for AS3581-221: Temp Rating: -20.0 FAHRENHEIT AND 400.0 FAHRENHEIT DEGF; Center Hole Diameter: 1.409 INCHES MINIMUM AND 1.433 INCHES MAXIMUM IN; Outside Diameter: 1.699 INCHES NOMINAL IN; Cross-Sectional Height: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN. 6 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5331-00-338-1382 still in active supply?

NSN 5331-00-338-1382 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.
PartsTable Design LLC · partstable.com