PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

4363661O-Ring

Oshkosh Defense Llc · NSN 5331-00-966-9138 · FSC 5331 · O-Ring
Verified by PartsTable
NSN 5331-00-966-9138 — this item is cataloged by the U.S. Government under National Stock Number 5331-00-966-9138. Primary manufacturer part number: 4363661.
Features
  • O-Ring — FSC 5331
  • Outside Diameter: 0.613 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN
  • Cross-Sectional Height: 0.075 INCHES MINIMUM AND 0.081 INCHES MAXIMUM IN
  • Material: RUBBER SYNTHETIC
  • Hardness Rating: 70.0 SHORE DUROMETER A NOMINAL
  • Elongation Percentage: 331 MAXIMUM
  • Temp Rating: -30.0 FAHRENHEIT AND 250.0 FAHRENHEIT DEGF
  • Center Hole Diameter: 0.461 INCHES MINIMUM AND 0.475 INCHES MAXIMUM IN
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
  • Applications requiring Rubber Synthetic construction
General Description

The O-Ring, cataloged under National Stock Number 5331-00-966-9138, is classified within Federal Supply Class 5331 (O-Ring) of the Hardware and Abrasives group. The primary manufacturer of record is Oshkosh Defense Llc. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 13 commercial cross-references from 11 manufacturers, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5331-00-966-9138
Primary Part Number4363661
Item NameO-Ring
FSC / FSG5331 / 53 — O-Ring
ManufacturerOshkosh Defense Llc
StatusCANCELLED
Outside Diameter0.613 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN
Cross-Sectional Height0.075 INCHES MINIMUM AND 0.081 INCHES MAXIMUM IN
MaterialRUBBER SYNTHETIC
Hardness Rating70.0 SHORE DUROMETER A NOMINAL
Elongation Percentage331 MAXIMUM
Temp Rating-30.0 FAHRENHEIT AND 250.0 FAHRENHEIT DEGF
Center Hole Diameter0.461 INCHES MINIMUM AND 0.475 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 7
6220-00-113-58551259 INTERCHANGEABLE
Light,marker,clearance
Truck-Lite Co., Llc
5120-00-595-9519 INTERCHANGEABLE
Pliers
4820-00-828-71920690-0035 INTERCHANGEABLE
Valve,check
Victor Equipment Co
5331-01-029-36742507294-50 INTERCHANGEABLE
O-Ring
Parker-Hannifin Corp Div O-Ring Division
4820-01-116-4689 INTERCHANGEABLE
Cap,valve
5999-01-136-680860R INTERCHANGEABLE
Clip,electrical
Mueller Electric Company, Inc. Div Mueller Electric Company
5331-01-219-0468 INTERCHANGEABLE
O-Ring
Cross-Reference Index
Part NumberManufacturer
4363661 PRIMARY Oshkosh Defense Llc (USA)
AS568-906MIL-G- 21569 CLASS 1 Zf Industrieantriebe Witten Gmbh (DEU)
60R Gates Corporation (USA)
AS568-906MILG21569CL1 PRIMARY Sae International Dba Sae International (USA)
N0647 3-906 PRIMARY Parker-Hannifin Corporation Dba Pneutronics Div Tube Fittings Division (USA)
3-906N674-7 Parker-Hannifin Corporation Dba Pneutronics Div Composite Sealing Systems Division (USA)
AS568-906MILG21569CL1 Society of Automotive Engineers Inc (USA)
3-906N674-7 Zf Industrieantriebe Witten Gmbh (DEU)
3-6N219-7 Parker-Hannifin Corp Div O-Ring Division (USA)
C004-6 Lockheed Martin Corporation Div Lockheed Martin Aeronautics Company (USA)
SF-10677 PIECE Circor Pumps North America Llc (USA)
3-906-N674-70 Zf Industrieantriebe Witten Gmbh (DEU)
3-906 N674-70 Parker Hannifin Gmbh O-Ring Division (DEU)
Related Parts
6220-00-113-5855INTERCHANGEABLE
LIGHT,MARKER,CLEARANCE
1259
5120-00-595-9519INTERCHANGEABLE
PLIERS
4820-00-828-7192INTERCHANGEABLE
VALVE,CHECK
0690-0035
5331-01-029-3674INTERCHANGEABLE
O-RING
2507294-50
4820-01-116-4689INTERCHANGEABLE
CAP,VALVE
5999-01-136-6808INTERCHANGEABLE
CLIP,ELECTRICAL
60R
5331-01-219-0468INTERCHANGEABLE
O-RING

Frequently Asked Questions

What is NSN 5331-00-966-9138?

NSN 5331-00-966-9138 is a O-Ring, manufactured by Oshkosh Defense Llc, classified under FSC 5331 (O-Ring). Status: cancelled.

What are the part numbers for NSN 5331-00-966-9138?

NSN 5331-00-966-9138 has 13 cross-referenced part numbers: 4363661 (Oshkosh Defense Llc), AS568-906MIL-G- 21569 CLASS 1 (Zf Industrieantriebe Witten Gmbh), 60R (Gates Corporation), AS568-906MILG21569CL1 (Sae International Dba Sae International), N0647 3-906 (Parker-Hannifin Corporation Dba Pneutronics Div Tube Fittings Division) and 8 more.

What NSN replaces 5331-00-966-9138?

There are 7 known substitutes for 5331-00-966-9138: 6220-00-113-5855, 5120-00-595-9519, 4820-00-828-7192 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 4363661?

Key specifications for 4363661: Outside Diameter: 0.613 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN; Cross-Sectional Height: 0.075 INCHES MINIMUM AND 0.081 INCHES MAXIMUM IN; Material: RUBBER SYNTHETIC; Hardness Rating: 70.0 SHORE DUROMETER A NOMINAL. 8 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5331-00-966-9138 still in active supply?

NSN 5331-00-966-9138 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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