PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

021-8307O-Ring

Parker Hannifin Corporation Div O-Ring Division · NSN 5331-00-411-8887 · FSC 5331 · O-Ring
Verified by PartsTable
NSN 5331-00-411-8887 — this item is cataloged by the U.S. Government under National Stock Number 5331-00-411-8887. Primary manufacturer part number: 021-8307.
Features
  • O-Ring — FSC 5331
  • Material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
  • Cross-Sectional Height: 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
  • Center Hole Diameter: 0.920 INCHES MINIMUM AND 0.932 INCHES MAXIMUM IN
  • 2 verified cross-references
  • Primary manufacturer: Parker Hannifin Corporation Div O-Ring Division
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 5331-00-411-8887, is classified within Federal Supply Class 5331 (O-Ring) of the Hardware and Abrasives group. The primary manufacturer of record is Parker Hannifin Corporation Div O-Ring Division. Government technical data includes 3 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. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5331-00-411-8887
Primary Part Number021-8307
Item NameO-Ring
FSC / FSG5331 / 53 — O-Ring
ManufacturerParker Hannifin Corporation Div O-Ring Division
StatusACTIVE
MaterialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
Cross-Sectional Height0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
Center Hole Diameter0.920 INCHES MINIMUM AND 0.932 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5306-00-144-3648 INTERCHANGEABLE
Bolt,machine
5331-01-601-165026558 INTERCHANGEABLE
O-Ring
Charles Reed Knight Jr Dba Knight's Armament Company
Cross-Reference Index
Part NumberManufacturer
26558 Triumph Thermal Systems - Maryland, Inc. (USA)
021-8307 PRIMARY Parker Hannifin Corporation Div O-Ring Division (USA)
Related Parts
5306-00-144-3648INTERCHANGEABLE
BOLT,MACHINE
5331-01-601-1650INTERCHANGEABLE
O-RING
26558

Frequently Asked Questions

What is NSN 5331-00-411-8887?

NSN 5331-00-411-8887 is a O-Ring, manufactured by Parker Hannifin Corporation Div O-Ring Division, classified under FSC 5331 (O-Ring). Status: active.

What are the part numbers for NSN 5331-00-411-8887?

NSN 5331-00-411-8887 has 2 cross-referenced part numbers: 26558 (Triumph Thermal Systems - Maryland, Inc.), 021-8307 (Parker Hannifin Corporation Div O-Ring Division).

What NSN replaces 5331-00-411-8887?

There are 2 known substitutes for 5331-00-411-8887: 5306-00-144-3648, 5331-01-601-1650. Verify interchangeability with system specifications before substitution.

What are the specifications of 021-8307?

Key specifications for 021-8307: Material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR; Cross-Sectional Height: 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN; Center Hole Diameter: 0.920 INCHES MINIMUM AND 0.932 INCHES MAXIMUM IN. 3 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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