PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

12KP279O-Ring

Oshkosh Defense Llc · NSN 5331-00-585-6663 · FSC 5331 · O-Ring
Verified by PartsTable
NSN 5331-00-585-6663 — this item is cataloged by the U.S. Government under National Stock Number 5331-00-585-6663. Primary manufacturer part number: 12KP279.
Features
  • O-Ring — FSC 5331
  • 50 verified cross-references
  • Primary manufacturer: Oshkosh Defense Llc
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
General Description

The O-Ring, cataloged under National Stock Number 5331-00-585-6663, is classified within Federal Supply Class 5331 (O-Ring) of the Hardware and Abrasives group. The primary manufacturer of record is Oshkosh Defense Llc. This item has 50 commercial cross-references from 39 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)
ManufacturersOshkosh Defense Llc (CAGE 75Q65); Parco, Llc (CAGE 77308); Knds Ammo France (CAGE F6307); Goriziane Group Spa (CAGE A9271); Eriks B.v. (CAGE H2313)
Technical Specifications
ParameterValue
NSN5331-00-585-6663
Primary Part Number12KP279
Item NameO-Ring
FSC / FSG5331 / 53 — O-Ring
ManufacturerOshkosh Defense Llc
StatusCANCELLED
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
1005-00-017-954262278 INTERCHANGEABLE
Receiver,upper
Colt's Manufacturing Company, Llc
5330-00-050-1211 INTERCHANGEABLE
Packing,preformed
5331-00-068-0337AS568B-110 INTERCHANGEABLE
O-Ring
Sae International Dba Sae International
5330-00-140-2187 INTERCHANGEABLE
Gasket
2920-00-212-90911796872 INTERCHANGEABLE
Starter,engine,electrical
Dana Off Highway Products, Llc
5975-00-442-3500 INTERCHANGEABLE
Entrance Cap,electrical
4730-00-528-27435282743 INTERCHANGEABLE
Connector,multiple,fluid Pressur
U S Army Tank Automotive Command Amsta-Im-Mm
5950-00-556-9058254054 INTERCHANGEABLE
Transformer,power
Cae Usa Inc.
5331-01-025-9996MS28775-110 INTERCHANGEABLE
O-Ring
Sae International Dba Sae International
5950-01-068-037572008 INTERCHANGEABLE
Coil,radio Frequency
Magnetic Component Engineering, Llc Dba Magnetic Component Engineering Inc
Cross-Reference Index
Part NumberManufacturer
12KP279 Oshkosh Defense Llc (USA)
4067-70-110 Parco, Llc (USA)
72008 Knds Ammo France (FRA)
MS28775-110 Goriziane Group Spa (ITA)
MS28784-110ES Eriks B.v. (NLD)
9,19X2,62-24B7 Le Joint Francais (FRA)
5330007224973 E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales
MS28775-110 Society of Automotive Engineers Inc (USA)
MS28775-110 Feinmechanische Werke Mainz Gmbh (DEU)
SP3108 Dresser Industries Inc Leroi Div (USA)
1797833PC7 Naval Sea Systems Command (USA)
1446-110 Parker-Hannifin Corporation Div O-Ring Division (USA)
N304-75-PC110 Parker-Hannifin Corp Div O-Ring Division (USA)
4160500-95 Zf Industrieantriebe Witten Gmbh (DEU)
MS28775-110 Liebherr-Aerospace Lindenberg Gmbh (DEU)
MS28775PC110 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
SR 832-75-110 Stillman Seal Corporation Div Stillman Seal Corperation (USA)
P48026-110 Acushnet Rubber Company, Inc. Dba Precix (USA)
MS28775-110 Sae International Dba Sae International (USA)
6227-8 Trelleborg Sealing Solutions El Segundo, Inc. Dba Tss El Segundo (USA)
Related Parts
1005-00-017-9542INTERCHANGEABLE
RECEIVER,UPPER
62278
5330-00-050-1211INTERCHANGEABLE
PACKING,PREFORMED
5331-00-068-0337INTERCHANGEABLE
O-RING
AS568B-110
5330-00-140-2187INTERCHANGEABLE
GASKET
2920-00-212-9091INTERCHANGEABLE
STARTER,ENGINE,ELECTRICAL
1796872
5975-00-442-3500INTERCHANGEABLE
ENTRANCE CAP,ELECTRICAL
4730-00-528-2743INTERCHANGEABLE
CONNECTOR,MULTIPLE,FLUID PRESSUR
5282743
5950-00-556-9058INTERCHANGEABLE
TRANSFORMER,POWER
254054
5331-01-025-9996INTERCHANGEABLE
O-RING
MS28775-110
5950-01-068-0375INTERCHANGEABLE
COIL,RADIO FREQUENCY
72008
5331-01-160-2508INTERCHANGEABLE
O-RING
M83461/1-110
5310-01-186-5422INTERCHANGEABLE
WASHER,KEYWAY

Frequently Asked Questions

What is NSN 5331-00-585-6663?

NSN 5331-00-585-6663 is a O-Ring, manufactured by Oshkosh Defense Llc, classified under FSC 5331 (O-Ring). Status: cancelled.

What are the part numbers for NSN 5331-00-585-6663?

NSN 5331-00-585-6663 has 50 cross-referenced part numbers: 12KP279 (Oshkosh Defense Llc), 4067-70-110 (Parco, Llc), 72008 (Knds Ammo France), MS28775-110 (Goriziane Group Spa), MS28784-110ES (Eriks B.v.) and 45 more.

What NSN replaces 5331-00-585-6663?

There are 12 known substitutes for 5331-00-585-6663: 1005-00-017-9542, 5330-00-050-1211, 5331-00-068-0337 and 9 more. Verify interchangeability with system specifications before substitution.

Is NSN 5331-00-585-6663 still in active supply?

NSN 5331-00-585-6663 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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