PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

20722 ITEM 4O-Ring

Allied Systems Company Dba Allied Systems Co · NSN 5331-01-340-6856 · FSC 5331 · O-Ring
Verified by PartsTable
NSN 5331-01-340-6856 — this item is cataloged by the U.S. Government under National Stock Number 5331-01-340-6856. Primary manufacturer part number: 20722 ITEM 4.
Features
  • O-Ring — FSC 5331
  • 2 verified cross-references
  • Primary manufacturer: Allied Systems Company Dba Allied Systems Co
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
General Description

The O-Ring, cataloged under National Stock Number 5331-01-340-6856, is classified within Federal Supply Class 5331 (O-Ring) of the Hardware and Abrasives group. The primary manufacturer of record is Allied Systems Company Dba Allied Systems Co. This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameO-Ring
FSC / FSG5331 — O-Ring (FSG 53)
ManufacturersZf Industrieantriebe Witten Gmbh (CAGE D9182); Allied Systems Company Dba Allied Systems Co (CAGE 60848)
Technical Specifications
ParameterValue
NSN5331-01-340-6856
Primary Part Number20722 ITEM 4
Item NameO-Ring
FSC / FSG5331 / 53 — O-Ring
ManufacturerAllied Systems Company Dba Allied Systems Co
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
4820-00-156-122420723 INTERCHANGEABLE
Stop,valve Spool
Cadillac Gage Textron Inc.
4730-00-254-62254-4 010202B INTERCHANGEABLE
Elbow,pipe to Tube
Sae International Dba Sae International
6630-00-490-173120723 INTERCHANGEABLE
Buret,laboratory
Dumbo Defense Inc
5998-01-035-610320723 INTERCHANGEABLE
Circuit Card Assembly
Transistor Devices Inc Div Astrodyne Tdi High Power Business Unit
5962-01-110-1609 INTERCHANGEABLE
Microcircuit,linear
Cross-Reference Index
Part NumberManufacturer
20723 Zf Industrieantriebe Witten Gmbh (DEU)
20722 ITEM 4 PRIMARY Allied Systems Company Dba Allied Systems Co (USA)
Related Parts
4820-00-156-1224INTERCHANGEABLE
STOP,VALVE SPOOL
20723
4730-00-254-6225INTERCHANGEABLE
ELBOW,PIPE TO TUBE
4-4 010202B
6630-00-490-1731INTERCHANGEABLE
BURET,LABORATORY
20723
5998-01-035-6103INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
20723
5962-01-110-1609INTERCHANGEABLE
MICROCIRCUIT,LINEAR

Frequently Asked Questions

What is NSN 5331-01-340-6856?

NSN 5331-01-340-6856 is a O-Ring, manufactured by Allied Systems Company Dba Allied Systems Co, classified under FSC 5331 (O-Ring). Status: active.

What are the part numbers for NSN 5331-01-340-6856?

NSN 5331-01-340-6856 has 2 cross-referenced part numbers: 20723 (Zf Industrieantriebe Witten Gmbh), 20722 ITEM 4 (Allied Systems Company Dba Allied Systems Co).

What NSN replaces 5331-01-340-6856?

There are 5 known substitutes for 5331-01-340-6856: 4820-00-156-1224, 4730-00-254-6225, 6630-00-490-1731 and 2 more. Verify interchangeability with system specifications before substitution.

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