PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

AS568-021D7O-Ring

Naval Inventory Control Point Mechanicsburg · NSN 5331-01-666-7214 · FSC 5331 · O-Ring
Verified by PartsTable
NSN 5331-01-666-7214 — this item is cataloged by the U.S. Government under National Stock Number 5331-01-666-7214. Primary manufacturer part number: AS568-021D7.
Features
  • O-Ring — FSC 5331
  • Reference Number Differentiating Characteristics: MATERIAL CONTROLLED IAW SS800-AG-MAN-010/P-9290 SYSTEM CERTIFICATION PROEDURES AND CRITERIA MANUAL FOR DEEP SUBMERGENCE SYSTEMS; CRITICAL ITEM FOR SAETY AND SURVIVAL OF DEEP SUBMERGENCE RESEARCH AND RESCUE VEHICLES AS DIFFERENTIATED BY SPECIAL TEST FEATURES
  • Criticality Code Justification: ZZZY
  • 5 verified cross-references
  • Primary manufacturer: Naval Inventory Control Point Mechanicsburg
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
General Description

The O-Ring, cataloged under National Stock Number 5331-01-666-7214, is classified within Federal Supply Class 5331 (O-Ring) of the Hardware and Abrasives group. The primary manufacturer of record is Naval Inventory Control Point Mechanicsburg. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5331-01-666-7214
Primary Part NumberAS568-021D7
Item NameO-Ring
FSC / FSG5331 / 53 — O-Ring
ManufacturerNaval Inventory Control Point Mechanicsburg
StatusACTIVE
Reference Number Differentiating CharacteristicsMATERIAL CONTROLLED IAW SS800-AG-MAN-010/P-9290 SYSTEM CERTIFICATION PROEDURES AND CRITERIA MANUAL FOR DEEP SUBMERGENCE SYSTEMS; CRITICAL ITEM FOR SAETY AND SURVIVAL OF DEEP SUBMERGENCE RESEARCH AND RESCUE VEHICLES AS DIFFERENTIATED BY SPECIAL TEST FEATURES
Criticality Code JustificationZZZY
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
5331-00-436-71072-021S613-6 INTERCHANGEABLE
O-Ring
Parker-Hannifin Corp Div O-Ring Division
5331-01-037-3444 INTERCHANGEABLE
O-Ring
5331-01-150-1209AS568-021 INTERCHANGEABLE
O-Ring
Beemer Precision Inc
Cross-Reference Index
Part NumberManufacturer
AS568-021D7 Naval Inventory Control Point Mechanicsburg (USA)
AS568-021 Sae International Dba Sae International (USA)
AS568-021 Society of Automotive Engineers Inc (USA)
8599135 ITEM 39 Naval Sea Systems Command (USA)
08599135 ITEM 39D7 Naval Inventory Control Point Mechanicsburg (USA)
Related Parts
5331-00-436-7107INTERCHANGEABLE
O-RING
2-021S613-6
5331-01-037-3444INTERCHANGEABLE
O-RING
5331-01-150-1209INTERCHANGEABLE
O-RING
AS568-021

Frequently Asked Questions

What is NSN 5331-01-666-7214?

NSN 5331-01-666-7214 is a O-Ring, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 5331 (O-Ring). Status: active.

What are the part numbers for NSN 5331-01-666-7214?

NSN 5331-01-666-7214 has 5 cross-referenced part numbers: AS568-021D7 (Naval Inventory Control Point Mechanicsburg), AS568-021 (Sae International Dba Sae International), AS568-021 (Society of Automotive Engineers Inc), 8599135 ITEM 39 (Naval Sea Systems Command), 08599135 ITEM 39D7 (Naval Inventory Control Point Mechanicsburg).

What NSN replaces 5331-01-666-7214?

There are 3 known substitutes for 5331-01-666-7214: 5331-00-436-7107, 5331-01-037-3444, 5331-01-150-1209. Verify interchangeability with system specifications before substitution.

What are the specifications of AS568-021D7?

Key specifications for AS568-021D7: Reference Number Differentiating Characteristics: MATERIAL CONTROLLED IAW SS800-AG-MAN-010/P-9290 SYSTEM CERTIFICATION PROEDURES AND CRITERIA MANUAL FOR DEEP SUBMERGENCE SYSTEMS; CRITICAL ITEM FOR SAETY AND SURVIVAL OF DEEP SUBMERGENCE RESEARCH AND RESCUE VEHICLES AS DIFFERENTIATED BY SPECIAL TEST FEATURES; Criticality Code Justification: ZZZY. 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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