PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

2100-20O-Ring

Kearflex Engineering Company · NSN 5331-00-137-1450 · FSC 5331 · O-Ring
Verified by PartsTable
NSN 5331-00-137-1450 — this item is cataloged by the U.S. Government under National Stock Number 5331-00-137-1450. Primary manufacturer part number: 2100-20.
Features
  • O-Ring — FSC 5331
  • Outside Diameter: 2.005 INCHES NOMINAL IN
  • Material: RUBBER
  • Center Hole Diameter: 1.789 INCHES MINIMUM AND 1.809 INCHES MAXIMUM IN
  • Cross-Sectional Height: 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
  • 4 verified cross-references
  • Primary manufacturer: Kearflex Engineering Company
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
  • Applications requiring Rubber construction
General Description

The O-Ring, cataloged under National Stock Number 5331-00-137-1450, is classified within Federal Supply Class 5331 (O-Ring) of the Hardware and Abrasives group. The primary manufacturer of record is Kearflex Engineering Company. Government technical data includes 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5331-00-137-1450
Primary Part Number2100-20
Item NameO-Ring
FSC / FSG5331 / 53 — O-Ring
ManufacturerKearflex Engineering Company
StatusACTIVE
Outside Diameter2.005 INCHES NOMINAL IN
MaterialRUBBER
Center Hole Diameter1.789 INCHES MINIMUM AND 1.809 INCHES MAXIMUM IN
Cross-Sectional Height0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
5905-00-110-51272100-2076 INTERCHANGEABLE
Resistor,variable,nonwire Wound,
Hewlett-Packard Company Dba HP
5950-00-927-082521-0020 INTERCHANGEABLE
Coil,radio Frequency
L3harris Interstate Electronics Corporation
3220-01-176-6815 INTERCHANGEABLE
Bar,saw
5910-01-383-9245210020 INTERCHANGEABLE
Capacitor,fixed,ceramic Dielectr
Datron World Communications, Inc.
4020-01-446-0671 INTERCHANGEABLE
Rope,fibrous
6515-01-617-4296210020 INTERCHANGEABLE
Catheter,cardiovascular
C. R. Bard Inc. Dba Bard Electrophysiology Div Bard Electrophysiology
2940-01-650-328321.002.0 INTERCHANGEABLE
Air Cleaner,intake
Trident Emergency Products, Llc
7050-01-667-50982100-20 INTERCHANGEABLE
Stylus,digital Computer System
Techgraphic Solutions Inc
4730-01-698-6103210-020 INTERCHANGEABLE
Nipple,special
Lasco Fittings Inc
Cross-Reference Index
Part NumberManufacturer
2100-20 PRIMARY Kearflex Engineering Company (USA)
10136944 Nimikkeistokeskus Ncb Finland (FIN)
ARP568-133 Sae International Dba Sae International (USA)
ARP568-133 Society of Automotive Engineers Inc (USA)
Related Parts
5905-00-110-5127INTERCHANGEABLE
RESISTOR,VARIABLE,NONWIRE WOUND,
2100-2076
5950-00-927-0825INTERCHANGEABLE
COIL,RADIO FREQUENCY
21-0020
3220-01-176-6815INTERCHANGEABLE
BAR,SAW
5910-01-383-9245INTERCHANGEABLE
CAPACITOR,FIXED,CERAMIC DIELECTR
210020
4020-01-446-0671INTERCHANGEABLE
ROPE,FIBROUS
6515-01-617-4296INTERCHANGEABLE
CATHETER,CARDIOVASCULAR
210020
2940-01-650-3283INTERCHANGEABLE
AIR CLEANER,INTAKE
21.002.0
7050-01-667-5098INTERCHANGEABLE
STYLUS,DIGITAL COMPUTER SYSTEM
2100-20
4730-01-698-6103INTERCHANGEABLE
NIPPLE,SPECIAL
210-020

Frequently Asked Questions

What is NSN 5331-00-137-1450?

NSN 5331-00-137-1450 is a O-Ring, manufactured by Kearflex Engineering Company, classified under FSC 5331 (O-Ring). Status: active.

What are the part numbers for NSN 5331-00-137-1450?

NSN 5331-00-137-1450 has 4 cross-referenced part numbers: 2100-20 (Kearflex Engineering Company), 10136944 (Nimikkeistokeskus Ncb Finland), ARP568-133 (Sae International Dba Sae International), ARP568-133 (Society of Automotive Engineers Inc).

What NSN replaces 5331-00-137-1450?

There are 9 known substitutes for 5331-00-137-1450: 5905-00-110-5127, 5950-00-927-0825, 3220-01-176-6815 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 2100-20?

Key specifications for 2100-20: Outside Diameter: 2.005 INCHES NOMINAL IN; Material: RUBBER; Center Hole Diameter: 1.789 INCHES MINIMUM AND 1.809 INCHES MAXIMUM IN; Cross-Sectional Height: 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN. 4 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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