PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21204O-Ring

Monnier Inc · NSN 5331-00-237-7641 · FSC 5331 · O-Ring
Verified by PartsTable
NSN 5331-00-237-7641 — this item is cataloged by the U.S. Government under National Stock Number 5331-00-237-7641. Primary manufacturer part number: 21204.
Features
  • O-Ring — FSC 5331
  • Center Hole Diameter: 2.290 INCHES MINIMUM AND 2.310 INCHES MAXIMUM IN
  • Material: RUBBER
  • Cross-Sectional Height: 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
  • 2 verified cross-references
  • Primary manufacturer: Monnier Inc
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 5331-00-237-7641, is classified within Federal Supply Class 5331 (O-Ring) of the Hardware and Abrasives group. The primary manufacturer of record is Monnier Inc. Government technical data includes 3 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5331-00-237-7641
Primary Part Number21204
Item NameO-Ring
FSC / FSG5331 / 53 — O-Ring
ManufacturerMonnier Inc
StatusACTIVE
Center Hole Diameter2.290 INCHES MINIMUM AND 2.310 INCHES MAXIMUM IN
MaterialRUBBER
Cross-Sectional Height0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5330-00-100-706721204 INTERCHANGEABLE
Gasket
Way Wolff Associates Inc
5330-00-107-2055131-21204 INTERCHANGEABLE
Gasket
Danfoss Inc
3110-00-293-93020042980-3 INTERCHANGEABLE
Bearing,ball,annular
New Holland Construction
6145-00-660-8719812-35 INTERCHANGEABLE
Cable,radio Frequency
Keysight Technologies Inc
5315-00-845-7787MS24665-289 INTERCHANGEABLE
Pin,cotter
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
4730-00-897-549721204 INTERCHANGEABLE
Coupling,pipe
Bendix Commercial Vehicle Systems Llc Dba Bendix Commercial Vehicle Systems
4820-01-012-861321204 INTERCHANGEABLE
Body,valve
Rogerson Aircraft Equipment Group
3020-01-094-0107CB27195-001 INTERCHANGEABLE
Gear Rack
Moog Inc. Dba Ampac-Isp Corp
6515-01-153-5657215.55 INTERCHANGEABLE
Screw,bone
Depuy Synthes Sales Inc Dba Depuy Synthes Trauma Div Depuy Synthes Sales, Inc., D/b/a Depuy Synthes Trauma
6640-01-153-6827P5057-100 INTERCHANGEABLE
Pipet,micro
Cardinal Health 200, Llc
Cross-Reference Index
Part NumberManufacturer
21204 Monnier Inc (USA)
21555 Monnier Inc (USA)
Related Parts
5330-00-100-7067INTERCHANGEABLE
GASKET
21204
5330-00-107-2055INTERCHANGEABLE
GASKET
131-21204
3110-00-293-9302INTERCHANGEABLE
BEARING,BALL,ANNULAR
0042980-3
6145-00-660-8719INTERCHANGEABLE
CABLE,RADIO FREQUENCY
812-35
5315-00-845-7787INTERCHANGEABLE
PIN,COTTER
MS24665-289
4730-00-897-5497INTERCHANGEABLE
COUPLING,PIPE
21204
4820-01-012-8613INTERCHANGEABLE
BODY,VALVE
21204
3020-01-094-0107INTERCHANGEABLE
GEAR RACK
CB27195-001
6515-01-153-5657INTERCHANGEABLE
SCREW,BONE
215.55
6640-01-153-6827INTERCHANGEABLE
PIPET,MICRO
P5057-100
4720-01-158-4614INTERCHANGEABLE
HOSE,PREFORMED
21204
6515-01-185-8837INTERCHANGEABLE
CURETTE,UTERINE,SUCTION
21555

Frequently Asked Questions

What is NSN 5331-00-237-7641?

NSN 5331-00-237-7641 is a O-Ring, manufactured by Monnier Inc, classified under FSC 5331 (O-Ring). Status: active.

What are the part numbers for NSN 5331-00-237-7641?

NSN 5331-00-237-7641 has 2 cross-referenced part numbers: 21204 (Monnier Inc), 21555 (Monnier Inc).

What NSN replaces 5331-00-237-7641?

There are 12 known substitutes for 5331-00-237-7641: 5330-00-100-7067, 5330-00-107-2055, 3110-00-293-9302 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21204?

Key specifications for 21204: Center Hole Diameter: 2.290 INCHES MINIMUM AND 2.310 INCHES MAXIMUM IN; Material: RUBBER; Cross-Sectional Height: 0.100 INCHES MINIMUM AND 0.106 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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