PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

20277O-Ring

Parker-Hannifin Corporation Dba Racor Division Div Racor Division · NSN 5331-01-556-4653 · FSC 5331 · O-Ring
Verified by PartsTable
NSN 5331-01-556-4653 — this item is cataloged by the U.S. Government under National Stock Number 5331-01-556-4653. Primary manufacturer part number: 20277.
Features
  • O-Ring — FSC 5331
  • 2 verified cross-references
  • Primary manufacturer: Parker-Hannifin Corporation Dba Racor Division Div Racor Division
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
General Description

The O-Ring, cataloged under National Stock Number 5331-01-556-4653, is classified within Federal Supply Class 5331 (O-Ring) of the Hardware and Abrasives group. The primary manufacturer of record is Parker-Hannifin Corporation Dba Racor Division Div Racor Division. This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5331-01-556-4653
Primary Part Number20277
Item NameO-Ring
FSC / FSG5331 / 53 — O-Ring
ManufacturerParker-Hannifin Corporation Dba Racor Division Div Racor Division
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
6210-00-478-900320277 INTERCHANGEABLE
Light,indicator
Tiffin Parts, L.l.c. Div Subsidiary of Pettibone Corp.
5365-00-515-1897 INTERCHANGEABLE
Shim
5962-00-577-4059351-8200-010 INTERCHANGEABLE
Microcircuit,digital
Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems
4410-00-613-2647SA150-11 INTERCHANGEABLE
Float and Rod
Itt Mcdonnell-Miller a Unit of Itt Fluid Handling Div
5935-00-681-47228909792 INTERCHANGEABLE
Connector,receptacle,electrical
Us Army Aviation and Missile Command
6640-01-416-6019 INTERCHANGEABLE
Regulator,ventilato
4820-01-540-340120409 INTERCHANGEABLE
Valve,regulating,fluid Pressure
Gas Turbine Efficiency Ab Gte
Cross-Reference Index
Part NumberManufacturer
20277 PRIMARY Parker-Hannifin Corporation Dba Racor Division Div Racor Division (USA)
1811053C1 Nd Defense Llc (USA)
Related Parts
6210-00-478-9003INTERCHANGEABLE
LIGHT,INDICATOR
20277
5365-00-515-1897INTERCHANGEABLE
SHIM
5962-00-577-4059INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
351-8200-010
4410-00-613-2647INTERCHANGEABLE
FLOAT AND ROD
SA150-11
5935-00-681-4722INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
8909792
6640-01-416-6019INTERCHANGEABLE
REGULATOR,VENTILATO
4820-01-540-3401INTERCHANGEABLE
VALVE,REGULATING,FLUID PRESSURE
20409

Frequently Asked Questions

What is NSN 5331-01-556-4653?

NSN 5331-01-556-4653 is a O-Ring, manufactured by Parker-Hannifin Corporation Dba Racor Division Div Racor Division, classified under FSC 5331 (O-Ring). Status: active.

What are the part numbers for NSN 5331-01-556-4653?

NSN 5331-01-556-4653 has 2 cross-referenced part numbers: 20277 (Parker-Hannifin Corporation Dba Racor Division Div Racor Division), 1811053C1 (Nd Defense Llc).

What NSN replaces 5331-01-556-4653?

There are 7 known substitutes for 5331-01-556-4653: 6210-00-478-9003, 5365-00-515-1897, 5962-00-577-4059 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 20277?

Key specifications for 20277: Part Name Assigned by Controlling Agency: RING,O; End Item Identification: MRAP - UNIQUE NSN - MAXXPRO CAT I. 2 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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