PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

4726O-Ring

Circor Aerospace, Inc. Dba Circor Aerospace Inc · NSN 5331-01-366-4921 · FSC 5331 · O-Ring
Verified by PartsTable
NSN 5331-01-366-4921 — this item is cataloged by the U.S. Government under National Stock Number 5331-01-366-4921. Primary manufacturer part number: 4726.
Features
  • O-Ring — FSC 5331
  • 1 verified cross-reference
  • Primary manufacturer: Circor Aerospace, Inc. Dba Circor Aerospace Inc
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
General Description

The O-Ring, cataloged under National Stock Number 5331-01-366-4921, is classified within Federal Supply Class 5331 (O-Ring) of the Hardware and Abrasives group. The primary manufacturer of record is Circor Aerospace, Inc. Dba Circor Aerospace Inc. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5331-01-366-4921
Primary Part Number4726
Item NameO-Ring
FSC / FSG5331 / 53 — O-Ring
ManufacturerCircor Aerospace, Inc. Dba Circor Aerospace Inc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
5940-00-113-3141MS20659-162 INTERCHANGEABLE
Terminal,lug
Sae International Dba Sae International
6640-00-145-1139 INTERCHANGEABLE
Test Tube,blood Collecting
6640-00-852-77644726 INTERCHANGEABLE
Test Tube,blood Collecting
Becton, Dickinson and Co Dba Becton Dickinson & Co
5915-00-863-582961760-1 INTERCHANGEABLE
Filter,band Pass
L3harris Technologies, Inc. Div Space and Airborne Systems
4820-00-916-35964726 INTERCHANGEABLE
Valve,check
Saylor-Beall Manufacturing Company
5935-01-083-6750 INTERCHANGEABLE
Connector,plug,electrical
5975-01-151-96934726 INTERCHANGEABLE
Mount Kit
Keystone Electronics Corp
3120-01-392-2959KIT-4726 INTERCHANGEABLE
Parts Kit,bearing Replacement,me
Meritor Heavy Vehicle Systems, Llc
5935-01-464-00864726 INTERCHANGEABLE
Connector,plug,electrical
Bryant Electric
6515-01-556-42801005202 INTERCHANGEABLE
Guide Wire,cardiovascular Cathet
Abbott Laboratories Inc. Div Abbott Vascular Inc
Cross-Reference Index
Part NumberManufacturer
4726 PRIMARY Circor Aerospace, Inc. Dba Circor Aerospace Inc (USA)
Related Parts
5940-00-113-3141INTERCHANGEABLE
TERMINAL,LUG
MS20659-162
6640-00-145-1139INTERCHANGEABLE
TEST TUBE,BLOOD COLLECTING
6640-00-852-7764INTERCHANGEABLE
TEST TUBE,BLOOD COLLECTING
4726
5915-00-863-5829INTERCHANGEABLE
FILTER,BAND PASS
61760-1
4820-00-916-3596INTERCHANGEABLE
VALVE,CHECK
4726
5935-01-083-6750INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
5975-01-151-9693INTERCHANGEABLE
MOUNT KIT
4726
3120-01-392-2959INTERCHANGEABLE
PARTS KIT,BEARING REPLACEMENT,ME
KIT-4726
5935-01-464-0086INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
4726
6515-01-556-4280INTERCHANGEABLE
GUIDE WIRE,CARDIOVASCULAR CATHET
1005202

Frequently Asked Questions

What is NSN 5331-01-366-4921?

NSN 5331-01-366-4921 is a O-Ring, manufactured by Circor Aerospace, Inc. Dba Circor Aerospace Inc, classified under FSC 5331 (O-Ring). Status: active.

What are the part numbers for NSN 5331-01-366-4921?

NSN 5331-01-366-4921 has 1 cross-referenced part number: 4726 (Circor Aerospace, Inc. Dba Circor Aerospace Inc).

What NSN replaces 5331-01-366-4921?

There are 10 known substitutes for 5331-01-366-4921: 5940-00-113-3141, 6640-00-145-1139, 6640-00-852-7764 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 4726?

Key specifications for 4726: End Item Identification: B-2. 1 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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