PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

55811O-Ring

Leroi International Inc Dba Compair Leroi · NSN 5331-01-351-6355 · FSC 5331 · O-Ring
Verified by PartsTable
NSN 5331-01-351-6355 — this item is cataloged by the U.S. Government under National Stock Number 5331-01-351-6355. Primary manufacturer part number: 55811.
Features
  • O-Ring — FSC 5331
  • 4 verified cross-references
  • Primary manufacturer: Leroi International Inc Dba Compair Leroi
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
General Description

The O-Ring, cataloged under National Stock Number 5331-01-351-6355, is classified within Federal Supply Class 5331 (O-Ring) of the Hardware and Abrasives group. The primary manufacturer of record is Leroi International Inc Dba Compair Leroi. This item has 4 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameO-Ring
FSC / FSG5331 — O-Ring (FSG 53)
ManufacturersCompair Kellogg Div of Robertshaw Controls Co (CAGE 53239); Goldshield Pharmaceuticals Ltd (CAGE U8737); Leroi International Inc Dba Compair Leroi (CAGE 1XBP3)
Technical Specifications
ParameterValue
NSN5331-01-351-6355
Primary Part Number55811
Item NameO-Ring
FSC / FSG5331 / 53 — O-Ring
ManufacturerLeroi International Inc Dba Compair Leroi
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
2940-00-141-9025 INTERCHANGEABLE
Filter Element,fluid
5360-00-179-650255811 INTERCHANGEABLE
Spring,helical,compression
Woodward Hrt Inc
4730-00-203-35046309 INTERCHANGEABLE
Coupling,pipe
Cnh Industrial America Llc Dba Cnh America
5998-00-763-1491SM-C-500651 INTERCHANGEABLE
Circuit Card Assembly
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
5930-00-820-954610670368 INTERCHANGEABLE
Switch,push
Us Army Aviation and Missile Command
4820-01-094-6253 INTERCHANGEABLE
Valve,check
5950-01-132-8101144A9810P1 INTERCHANGEABLE
Transformer,current
Bae Systems Controls Inc.
6145-01-216-57659751 INTERCHANGEABLE
Cable,special Purpose,electrical
Belden Wire & Cable Company Llc Dba Belden Cdt Electronics Division
5340-01-302-2106152-001229-001 INTERCHANGEABLE
Lever,manual Control
G & Z Industries Inc
6530-01-304-0199 INTERCHANGEABLE
Disposal Container,chemotherapy
Cross-Reference Index
Part NumberManufacturer
55811 Compair Kellogg Div of Robertshaw Controls Co (USA)
9751 Goldshield Pharmaceuticals Ltd (GBR)
9751 Compair Kellogg Div of Robertshaw Controls Co (USA)
55811 PRIMARY Leroi International Inc Dba Compair Leroi (USA)
Related Parts
2940-00-141-9025INTERCHANGEABLE
FILTER ELEMENT,FLUID
5360-00-179-6502INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
55811
4730-00-203-3504INTERCHANGEABLE
COUPLING,PIPE
6309
5998-00-763-1491INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
SM-C-500651
5930-00-820-9546INTERCHANGEABLE
SWITCH,PUSH
10670368
4820-01-094-6253INTERCHANGEABLE
VALVE,CHECK
5950-01-132-8101INTERCHANGEABLE
TRANSFORMER,CURRENT
144A9810P1
6145-01-216-5765INTERCHANGEABLE
CABLE,SPECIAL PURPOSE,ELECTRICAL
9751
5340-01-302-2106INTERCHANGEABLE
LEVER,MANUAL CONTROL
152-001229-001
6530-01-304-0199INTERCHANGEABLE
DISPOSAL CONTAINER,CHEMOTHERAPY

Frequently Asked Questions

What is NSN 5331-01-351-6355?

NSN 5331-01-351-6355 is a O-Ring, manufactured by Leroi International Inc Dba Compair Leroi, classified under FSC 5331 (O-Ring). Status: active.

What are the part numbers for NSN 5331-01-351-6355?

NSN 5331-01-351-6355 has 4 cross-referenced part numbers: 55811 (Compair Kellogg Div of Robertshaw Controls Co), 9751 (Goldshield Pharmaceuticals Ltd), 9751 (Compair Kellogg Div of Robertshaw Controls Co), 55811 (Leroi International Inc Dba Compair Leroi).

What NSN replaces 5331-01-351-6355?

There are 10 known substitutes for 5331-01-351-6355: 2940-00-141-9025, 5360-00-179-6502, 4730-00-203-3504 and 7 more. Verify interchangeability with system specifications before substitution.

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