PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

J221P115O-Ring

Fincantieri S.p.a. Div Direzione Navi Militari · NSN 5331-00-166-1066 · FSC 5331 · O-Ring
Verified by PartsTable
NSN 5331-00-166-1066 — this item is cataloged by the U.S. Government under National Stock Number 5331-00-166-1066. Primary manufacturer part number: J221P115.
Features
  • O-Ring — FSC 5331
  • 50 verified cross-references
  • Primary manufacturer: Fincantieri S.p.a. Div Direzione Navi Militari
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
General Description

The O-Ring, cataloged under National Stock Number 5331-00-166-1066, is classified within Federal Supply Class 5331 (O-Ring) of the Hardware and Abrasives group. The primary manufacturer of record is Fincantieri S.p.a. Div Direzione Navi Militari. This item has 50 commercial cross-references from 30 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Catalog Facts
Item NameO-Ring
FSC / FSG5331 — O-Ring (FSG 53)
ManufacturersFincantieri S.p.a. Div Direzione Navi Militari (CAGE A3121); Naval Ship Systems Command (CAGE 80064); Naval Sea Systems Command (CAGE 53711); Parco, Llc (CAGE 77308); Zf Industrieantriebe Witten Gmbh (CAGE D9182)
Technical Specifications
ParameterValue
NSN5331-00-166-1066
Primary Part NumberJ221P115
Item NameO-Ring
FSC / FSG5331 / 53 — O-Ring
ManufacturerFincantieri S.p.a. Div Direzione Navi Militari
StatusCANCELLED
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5950-00-122-173251670 INTERCHANGEABLE
Coil,electrical
Cae Inc
4320-00-143-589451670 INTERCHANGEABLE
Retainer,pump
Eaton Aerospace, Llc Dba Jackson South
5315-00-146-263513-800 INTERCHANGEABLE
Pin,straight,headless
Pdi Ground Support Systems, Inc.
5935-00-220-2288 INTERCHANGEABLE
Connector,receptacle,electrical
5940-00-258-5200 INTERCHANGEABLE
Terminal,stud
9540-00-508-8788 INTERCHANGEABLE
Angle,structural
3020-00-517-169951670 INTERCHANGEABLE
Gear,spur
Ambac International Corporation Div Ambac International
4130-00-665-037613800 INTERCHANGEABLE
Temperature Control
Hdt Expeditionary Systems Inc
5331-00-864-7185 INTERCHANGEABLE
O-Ring
5330-00-958-30872-115 V747-75 INTERCHANGEABLE
Packing,preformed
Parker-Hannifin Corp Div O-Ring Division
Cross-Reference Index
Part NumberManufacturer
J221P115 Fincantieri S.p.a. Div Direzione Navi Militari (ITA)
SS845-1889836PI Naval Ship Systems Command (USA)
556-6408589-32 Naval Sea Systems Command (USA)
PRP568-115-975-75 Parco, Llc (USA)
MS9388-115 Zf Industrieantriebe Witten Gmbh (DEU)
2-115V884-75 Zf Industrieantriebe Witten Gmbh (DEU)
2642-785-01 ITEM 89 Electric Boat Corporation Div General Dynamics Electric Boat (USA)
255773PC100 Huntington Ingalls Inc Div Newport News Shipbuilding (USA)
6240B Siemens Energy, Inc. Dba Dresser-Rand (USA)
2-115V747-70 Zf Industrieantriebe Witten Gmbh (DEU)
6983491-100 Zf Industrieantriebe Witten Gmbh (DEU)
122-2422410 PC 393 Naval Ship Systems Command (USA)
S9413-115 Honeywell International Inc. Div Aerospace - Torrance (USA)
28-P-71 Dana Corp Spicer Transmission Div (USA)
5331PL0930065 Jednolity Indeks Materialowy - Uniform Material Index (POL)
2-115V747-75 Zf Industrieantriebe Witten Gmbh (DEU)
J221P115 Ge Avio Srl (ITA)
M83248/1-115 Lockheed Martin Aeronautical Systems Support Company Dba Lmassc (USA)
R149P115C General Electric Company (USA)
649-393-115-0 Cfm International Inc Dba Cfm International (USA)
Related Parts
5950-00-122-1732INTERCHANGEABLE
COIL,ELECTRICAL
51670
4320-00-143-5894INTERCHANGEABLE
RETAINER,PUMP
51670
5315-00-146-2635INTERCHANGEABLE
PIN,STRAIGHT,HEADLESS
13-800
5935-00-220-2288INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
5940-00-258-5200INTERCHANGEABLE
TERMINAL,STUD
9540-00-508-8788INTERCHANGEABLE
ANGLE,STRUCTURAL
3020-00-517-1699INTERCHANGEABLE
GEAR,SPUR
51670
4130-00-665-0376INTERCHANGEABLE
TEMPERATURE CONTROL
13800
5331-00-864-7185INTERCHANGEABLE
O-RING
5330-00-958-3087INTERCHANGEABLE
PACKING,PREFORMED
2-115 V747-75
5305-00-999-3535INTERCHANGEABLE
SCREW,MACHINE
6625-01-039-7675INTERCHANGEABLE
ANALYZER,MULTICHANNEL SYSTEM
6240B

Frequently Asked Questions

What is NSN 5331-00-166-1066?

NSN 5331-00-166-1066 is a O-Ring, manufactured by Fincantieri S.p.a. Div Direzione Navi Militari, classified under FSC 5331 (O-Ring). Status: cancelled.

What are the part numbers for NSN 5331-00-166-1066?

NSN 5331-00-166-1066 has 50 cross-referenced part numbers: J221P115 (Fincantieri S.p.a. Div Direzione Navi Militari), SS845-1889836PI (Naval Ship Systems Command), 556-6408589-32 (Naval Sea Systems Command), PRP568-115-975-75 (Parco, Llc), MS9388-115 (Zf Industrieantriebe Witten Gmbh) and 45 more.

What NSN replaces 5331-00-166-1066?

There are 12 known substitutes for 5331-00-166-1066: 5950-00-122-1732, 4320-00-143-5894, 5315-00-146-2635 and 9 more. Verify interchangeability with system specifications before substitution.

Is NSN 5331-00-166-1066 still in active supply?

NSN 5331-00-166-1066 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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