PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

RK 18678O-Ring

Parker-Hannifin Corporation Dba Racor Division Div Racor Division · NSN 5331-01-077-3823 · FSC 5331 · O-Ring
Verified by PartsTable
NSN 5331-01-077-3823 — this item is cataloged by the U.S. Government under National Stock Number 5331-01-077-3823. Primary manufacturer part number: RK 18678.
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 5331-01-077-3823, 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 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameO-Ring
FSC / FSG5331 — O-Ring (FSG 53)
ManufacturersParker-Hannifin Corporation Dba Racor Division Div Racor Division (CAGE 55752)
Technical Specifications
ParameterValue
NSN5331-01-077-3823
Primary Part NumberRK 18678
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
3020-00-030-226514-18108-00 INTERCHANGEABLE
Gear,worm
American Concorde Systems Inc
5826-00-623-7272 INTERCHANGEABLE
Ring Assy
4320-00-703-899318-108 INTERCHANGEABLE
Rotor
Hamilton Sundstrand Corporation
5306-01-395-480518108 INTERCHANGEABLE
Bolt,machine
Westerbeke Corporation
6680-01-549-726318108 INTERCHANGEABLE
Transmitter,liquid Quantity
Generac Mobile Products, Llc
6515-01-586-4500A10011A INTERCHANGEABLE
Electrode,peripheral Nerve Stimu
Cardinal Health 200, Llc
9390-01-668-650418108 INTERCHANGEABLE
Wick
Consolidated Sewing Machine Corp
Cross-Reference Index
Part NumberManufacturer
RK 18678 PRIMARY Parker-Hannifin Corporation Dba Racor Division Div Racor Division (USA)
18108 Parker-Hannifin Corporation Dba Racor Division Div Racor Division (USA)
Related Parts
3020-00-030-2265INTERCHANGEABLE
GEAR,WORM
14-18108-00
5826-00-623-7272INTERCHANGEABLE
RING ASSY
4320-00-703-8993INTERCHANGEABLE
ROTOR
18-108
5306-01-395-4805INTERCHANGEABLE
BOLT,MACHINE
18108
6680-01-549-7263INTERCHANGEABLE
TRANSMITTER,LIQUID QUANTITY
18108
6515-01-586-4500INTERCHANGEABLE
ELECTRODE,PERIPHERAL NERVE STIMU
A10011A
9390-01-668-6504INTERCHANGEABLE
WICK
18108

Frequently Asked Questions

What is NSN 5331-01-077-3823?

NSN 5331-01-077-3823 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 5331-01-077-3823?

NSN 5331-01-077-3823 has 2 cross-referenced part numbers: RK 18678 (Parker-Hannifin Corporation Dba Racor Division Div Racor Division), 18108 (Parker-Hannifin Corporation Dba Racor Division Div Racor Division).

What NSN replaces 5331-01-077-3823?

There are 7 known substitutes for 5331-01-077-3823: 3020-00-030-2265, 5826-00-623-7272, 4320-00-703-8993 and 4 more. Verify interchangeability with system specifications before substitution.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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