PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

AS3581-135O-Ring

Sae International Dba Sae International · NSN 5331-01-128-0432 · FSC 5331 · O-Ring
Verified by PartsTable
NSN 5331-01-128-0432 — this item is cataloged by the U.S. Government under National Stock Number 5331-01-128-0432. Primary manufacturer part number: AS3581-135.
Features
  • O-Ring — FSC 5331
  • Hardness Rating: 90.0 SHORE DUROMETER A NOMINAL
  • Material: RUBBER FLUOROCARBON CLASS FPM
  • Center Hole Diameter: 1.908 INCHES MINIMUM AND 1.942 INCHES MAXIMUM IN
  • Temp Rating: -20.0 FAHRENHEIT AND 400.0 FAHRENHEIT DEGF
  • Cross-Sectional Height: 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
  • Outside Diameter: 2.131 INCHES NOMINAL IN
  • 10 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 5331-01-128-0432, is classified within Federal Supply Class 5331 (O-Ring) of the Hardware and Abrasives group. The primary manufacturer of record is Sae International Dba Sae International. Government technical data includes 6 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 10 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5331-01-128-0432
Primary Part NumberAS3581-135
Item NameO-Ring
FSC / FSG5331 / 53 — O-Ring
ManufacturerSae International Dba Sae International
StatusACTIVE
Hardness Rating90.0 SHORE DUROMETER A NOMINAL
MaterialRUBBER FLUOROCARBON CLASS FPM
Center Hole Diameter1.908 INCHES MINIMUM AND 1.942 INCHES MAXIMUM IN
Temp Rating-20.0 FAHRENHEIT AND 400.0 FAHRENHEIT DEGF
Cross-Sectional Height0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
Outside Diameter2.131 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
5331-00-455-7025 INTERCHANGEABLE
O-Ring
2520-00-700-07292843G111 INTERCHANGEABLE
Shaft Transfer Gear
Meritor Heavy Vehicle Systems, Llc
7610-00-753-5082J120 INTERCHANGEABLE
Manual,technical
Federal Equipment and Manufacturing Co., Inc. Div Federal Equipment & Manufacturing Co., Inc.
5330-01-241-1923 INTERCHANGEABLE
Packing,preformed
5330-01-265-2447120R2 CLASS 1 SIZE R125 AMS3215 INTERCHANGEABLE
Packing,preformed
Sae International Dba Sae International
6520-01-270-8842J-120 INTERCHANGEABLE
Chain,elastomeric,dental
Rocky Mountain Orthodontics Inc Dba Rmo Inc
Cross-Reference Index
Part NumberManufacturer
J120, CLII,SZ135 Sae International Dba Sae International (USA)
MIL-R-83248/2 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
5331PL1262353 Jednolity Indeks Materialowy - Uniform Material Index (POL)
M83248/2-135 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
AS3581-135 Society of Automotive Engineers Inc (USA)
J120 Society of Automotive Engineers Inc (USA)
J120, CLII,SZ135 Society of Automotive Engineers Inc (USA)
SAE-AS3581 Sae International Dba Sae International (USA)
AS3581-135 PRIMARY Sae International Dba Sae International (USA)
J120 Sae International Dba Sae International (USA)
Related Parts
5331-00-455-7025INTERCHANGEABLE
O-RING
2520-00-700-0729INTERCHANGEABLE
SHAFT TRANSFER GEAR
2843G111
7610-00-753-5082INTERCHANGEABLE
MANUAL,TECHNICAL
J120
5330-01-241-1923INTERCHANGEABLE
PACKING,PREFORMED
5330-01-265-2447INTERCHANGEABLE
PACKING,PREFORMED
120R2 CLASS 1 SIZE R125 AMS3215
6520-01-270-8842INTERCHANGEABLE
CHAIN,ELASTOMERIC,DENTAL
J-120

Frequently Asked Questions

What is NSN 5331-01-128-0432?

NSN 5331-01-128-0432 is a O-Ring, manufactured by Sae International Dba Sae International, classified under FSC 5331 (O-Ring). Status: active.

What are the part numbers for NSN 5331-01-128-0432?

NSN 5331-01-128-0432 has 10 cross-referenced part numbers: J120, CLII,SZ135 (Sae International Dba Sae International), MIL-R-83248/2 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 5331PL1262353 (Jednolity Indeks Materialowy - Uniform Material Index), M83248/2-135 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), AS3581-135 (Society of Automotive Engineers Inc) and 5 more.

What NSN replaces 5331-01-128-0432?

There are 6 known substitutes for 5331-01-128-0432: 5331-00-455-7025, 2520-00-700-0729, 7610-00-753-5082 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of AS3581-135?

Key specifications for AS3581-135: Hardness Rating: 90.0 SHORE DUROMETER A NOMINAL; Material: RUBBER FLUOROCARBON CLASS FPM; Center Hole Diameter: 1.908 INCHES MINIMUM AND 1.942 INCHES MAXIMUM IN; Temp Rating: -20.0 FAHRENHEIT AND 400.0 FAHRENHEIT DEGF. 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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